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200 (OK) Response Code

The 200 (OK) response code is a HTTP response code that indicates your request was successful.


The HTTP 301 Moved Permanently status code indicates that the requested resource has been permanently moved to a new location.


The HTTP 302 redirect status code indicates the requested resource has been temporarily moved to a new URL.

304 Not Modified

The HTTP 304 Not Modified status code indicates the resource you are trying to access has not been modified since your last request.

403 Forbidden

The HTTP 403 Forbidden status code indicates the server understood the client's request but will not fulfill it as the user lacks the required permissions or authorization to access the requested resource.

404 Not Found

The HTTP 404 Not Found status code indicates the server cannot find the requested resource or webpage.

410 Gone

The HTTP 410 Gone status code indicates the requested resource or webpage has been permanently deleted from the internet.

500 Internal Server Error

The HTTP 500 Internal Server Error status code indicates the server encountered an unexpected issue preventing it from fulfilling your request.

502 Bad Gateway

The 502 Bad Gateway status code indicates the gateway or proxy server received an invalid or faulty response from another server while trying to fulfill the client's request.

Above the Fold

Above the Fold refers to the content located at the top of a webpage that a visitor landing on the webpage can view without scrolling.


An affiliate is a person, business, or organization that advertises an external product or service in exchange for a commission when a sale is made. 

AI Content

AI content refers to text, audio, video, and images created using artificial intelligence (AI) tools.


Also called alternative text, an alt text is a short description of the image on a webpage.

AMP (Accelerated Mobile Pages)

Accelerated Mobile Pages (AMP) is an open-source HTML framework that allows site owners to create mobile-friendly versions of their sites.

Anchor Text

An anchor text is the clickable text on a webpage. It is often blue and may be underlined.

Article Spinning

Article spinning, or content spinning, refers to the practice of rewriting someone else's content and then passing it off as new.

Article Syndication

Article syndication is the practice of publishing the same article, either in part or in full, across multiple sites.


Backlink Profile

A backlink profile refers to the collection of backlinks pointing to your site.


BERT, or Bidirectional Encoder Representations from Transformers, is the AI language model that Google uses to understand the intent of a search query.

Bing Webmaster Tools

Bing Webmaster Tools is a free service that provides website owners and SEO professionals with tools to monitor and optimize their sites for Bing.


Bingbot is a web crawler used by Microsoft to gather information and build a searchable index of the web. Bingbot powers the Bing search engine.


Blog commenting refers to the practice of leaving valuable comments on a blog to receive backlinks and build a relationship with the site owner and their audience. 


Bounce rate is the percentage of visitors that arrive and leave a site without interacting or visiting another webpage on the site.

Brand Mentions

Brand mentions refer to any online content mentioning the name of your business, product, or brand.


A breadcrumb is a navigational aid that shows visitors their current location on a website.

Bridge Page

A bridge page is a landing page created to send the visitor to another webpage.

Broad Match

Broad match is a keyword match type in online advertising that serves your ads when the search query contains one or more words from your preferred keyword(s).

Broken Link

A broken link or a dead link leads to a non-existent page or resource.


A business listing is an online directory entry that contains the details of your business.


Call to Action (CTA)

A call to action (CTA) is a text, image, or button that encourages a website or app user to perform an action.

Click Through Rate (CTR)

Click through rate (CTR) is a metric for measuring the number of clicks an ad or webpage receives.


Cloaking is the practice of showing visitors and search engines different versions of the same webpage, URL, or content. 

Core Web Vitals

Core Web Vitals are a set of metrics Google uses to determine a webpage's user-friendliness, responsiveness, stability, and load performance.

Cornerstone Content

Cornerstone content refers to the most important content on your site that you want to rank in search engines.

Crawl Budget

A crawl budget refers to the maximum number of pages a search engine will crawl on your site within a period.

Crawl Delay

Crawl delay directive specifies how quickly a crawler bot can request pages on your website.


Crawl errors are issues that prevent search engine crawler bots from crawling your entire site or specific pages on your site.


クロール可能性とは、検索エンジンが Web サイトにアクセスしてクロールする能力です。


クローラーは、検索エンジンが Web ページに関する情報を収集するために使用するボットです。



インデックスの解除とは、Web ページまたはその他の Web コンテンツを検索エンジンの結果ページから削除することです。


The disavow tool is a web tool for telling Google to ignore links you paid for or gained using techniques considered unnatural.

DNS (Domain Name System)

The DNS (Domain Name System) converts the human readable domain names into machine readable IP addresses.

Dofollow Link

A dofollow link is a link that passes link equity and authority to the webpage it points to.

Domain Authority

Domain authority (DA) is a metric that predicts the likelihood of a site to rank in search engine result pages.

Domain Name

A domain name is an easy-to-recognize string of characters associated with the IP address of the website.


Downtime refers to the period during which a website is totally or partially inaccessible.

Dwell Time

Dwell time refers to the total time a visitor spends on a webpage before returning to the search engine results page. 


動的サイトマップは、人またはボットがサイトマップの URL にアクセスするたびに自動的に生成される XML サイトマップです。



EEAT または Double-EAT (経験、専門知識、権威性、信頼性) は、Google 検索品質評価者がウェブページの品質を評価するために使用する一連のシグナルです。

Email Outreach



エントリーページは、訪問者が Web サイトで最初に見るページです。 


Featured Snippet

Featured snippets are the brief results that appear at the top of Google results.

First Contentful Paint (FCP)

First Contentful Paint (FCP) is the time it takes for the browser to display the first visible element of a webpage after a user requests it. 



Gated content refers to web content that visitors can access only after sharing their contact details usually through a form.


Google Adwords is a platform for creating advertisements to display on Google-owned services and third-party partner sites.

Google アラート

Google Alerts is a free notification service that allows users to monitor the web for articles, videos, books, and online forum posts containing specific keywords.

Google Bombing 

Google bombing refers to the practice of manipulating search engines so that a website ranks for an unrelated search term.

Google Caffeine 

Google Caffeine was a major algorithm update that increased the fresh results included in Google search result pages by 50%.

Google Dance 

Google Dance refers to the massive changes that occur in search rankings when Google updates its algorithm.

Google Discover

Google Discover is a Google Search feature that presents mobile users with content they may be interested in.

Google Hummingbird 

Google Hummingbird は、検索クエリを理解し、より関連性の高い検索結果を提供する Google の能力を向上させる、重要なアルゴリズムのアップデートです。


Google キーワード プランナーは、Google で広告を掲載したり、コンテンツに含める新しいキーワードを発見したいと考えている SEO やブロガーのためのキーワード調査ツールです。 

Google Medic Update

Google Medic Update は、Your Money or Your Life (YMYL) キーワードでランク付けされているものの EEAT シグナルが低いサイトのランキングを下げる主要なアルゴリズム アップデートでした。

Google Penalty 

Google penalty is the loss in search rankings experienced by sites that engage in SEO practices that go against Google's guidelines.

Google Sandbox

Google Sandbox is the term SEOs use to describe an unconfirmed filter that supposedly prevents new sites from appearing in Google search results.

Google Top Heavy Update

The Google Top Heavy Update is a major algorithm update intended to reduce the rankings of sites that show too many ads above the fold.


Google Trends is a free Google tool that allows you to explore and analyze the popularity of search terms over a period.


Googlebot is the name of the web crawler Google uses to crawl and collect the content of webpages.


Header Tags

Header tags are the HTML tags used to represent the hierarchy of the headings on a webpage.

Holistic SEO

Holistic SEO refers to the practice of meeting and exceeding the SEO requirements in order to raise its ranking on search engine results pages.


Hreflang is an HTML attribute that specifies the language and location of the audience that a webpage is targeted at.


HTTP is the set of rules that browsers, web apps, and servers follow to exchange files over the internet.


Indexability is the ability of a webpage to be indexed by search engines.


Keyword Cannibalization

Keyword cannibalization occurs when a site has multiple pages ranking for the same or similar keywords.

Keyword Density




Keyword Stuffing 



A keyword is a word or phrase that represents the main topic of a webpage or piece of content.


Link Equity

Link equity, or link juice, is the value and authority a webpage passes to any webpage it links to.

Link Exchange

A link exchange is a practice wherein two websites agree to link to one another to increase their backlink count and improve their search engine rankings.


A link farm is a group of sites that link to one another with the intent of increasing their rankings on search results pages. 

Link Popularity

Link popularity is a method for measuring the quality and quantity of the backlinks pointing to a webpage.

Link Reclamation

Link reclamation is the practice of fixing the broken internal and inbound links pointing to your webpages.

Link Rot

Link rot refers to the phenomenon whereby a link on the internet becomes broken or non-functional over time.


A link scheme is any black hat link-building tactic intended to manipulate search results and increase the number of backlinks pointing to a webpage.

Link Spam

Link spam is any link building technique done to manipulate search results.

Link Velocity

Link velocity is an SEO metric that measures the rate at which a site acquires new backlinks.


ローカル SEO は、関連するローカル検索クエリに表示されるようにビジネスを最適化する実践です。

Log File Analysis

Log file analysis is the process of using your site's log file to identify issues with your server and opportunities to improve your technical SEO.

LSI Keywords

LSI キーワードは、Latent Semantic Indexing キーワードの略で、Web ページ上の注目キーワードに関連する単語や語句です。


Manual Action

Manual action, or Google penalty, is the punishment that Google imposes on sites that engage in activities that go against its guidelines.

Meta Description

A meta description is an HTML tag used to provide a brief summary of the webpage and displayed under title in SERP.


Meta keywords are HTML meta tags used to provide more information about the topic of the webpage. They usually include the focus keywords you intend to target with the page.

Meta Redirect

A meta redirect is an HTML attribute instructing the browser to refresh and redirect the user to another URL after a specified period.

Meta Refresh

Meta refresh is an HTML attribute that instructs a browser to refresh the page and, possibly, redirect the visitor to another webpage or site after a set duration. 


Meta tags are HTML tags used to specify additional details about a webpage.


Minification is the process of reducing the size of a site's code. 

Mobile-First Indexing

Mobile-first indexing refers to Google’s initiative of prioritizing the mobile version of a site over its desktop version.



No image index is a meta tag instructing search engines not to index or display the images of a webpage in search results.

No Snippet

The No Snippet meta tag instructs Google not to display text snippets or video previews for the webpage.


Nofollow は、リンクをたどらないように、またはリンク エクイティを渡さないように検索エンジンに指示するメタ タグまたは属性です。


Noreferrer は、リンクのクリックを通じて渡されるすべての参照情報を削除するための HTML 属性です。


オフページ SEO

オフページ SEO は、検索ランキングを向上させるために、あなたの Web サイト以外の Web サイトで行われる SEO アクティビティを指します。


On-page SEO refers to the search engine optimizations performed on your website.

グラフのメタ タグを開く

Open Graph meta tags are code snippets that determine how your site is displayed when shared on social media and instant messaging apps like Facebook, X, WhatsApp, Slack and others. 

Organic Search Results

Organic search results are the unpaid results that appear on search engine result pages. 

Organic Traffic

Organic traffic refers to visitors that arrive at your site from the unpaid results on search engine results pages.

Orphan Page

An orphan page is a webpage that is not linked to from any other page on the same site. 


Page Views

Page views refer to the number of views a webpage receives over a period of time.


PageRank is an algorithm that Google uses to analyze the quality and quantity of the backlinks pointing to a webpage and determine the level of authority to assign to it.

PageSpeed Insights

PageSpeed Insights is a free tool that reports on various metrics for analyzing the user experience and page speed of a webpage.

Paid Link

A paid link is a backlink you receive in exchange for payment in the form of money or other expensive gift/item of equivalent value.

Pay-Per-Click (PPC)

Pay-per-click (PPC) is an online advertising model where advertisers pay only when visitors click on their ads.

People Also Ask

People Also Ask is a Google search result feature that displays a series of questions related to your search query.

Pillar Page

A pillar page is a webpage that covers the major aspects of a topic and contains links to other pages that offer more insights into specific parts of the topic.


Pogo-sticking is when someone searches for something, clicks on a result, goes to the webpage, and then goes back to the search results to click on another result.

Primary Keyword

A primary or focus keyword is the main keyword an SEO or blogger wants a piece of content to rank for.


Pruning, or content pruning, is the practice of removing irrelevant, low-quality, or low-traffic content from a website.


Ranking Factor

Ranking factors refer to the metrics and criteria a search engine uses to determine the position of your webpage in search results.

Reciprocal Link

A reciprocal link is a link given to an external site in exchange for a backlink.

Reconsideration Request

A reconsideration request is an appeal you send to Google to review your site after fixing the issues that caused Google to penalize you with a manual action or security issue notification.


A redirect is a technique for automatically sending visitors from one URL to another.


A redirect chain occurs when there are several redirections between the URL you're visiting and the final URL you're being redirected to.

Referral Traffic

Referral traffic refers to visitors landing on your site after clicking on your link at an external site.

Resource Pages

リソース ページには、作成者が視聴者にとって役立つと考える他のコンテンツ、ツール、サービスへのリンクが含まれています。


robots メタ タグは、Web ページをクロール、インデックス付け、検索結果に表示する方法を検索エンジン クローラーに指示するための HTML メタ タグです。


Robots.txt は、検索エンジン クローラー ボットやその他のボットに、Web サイト上でクロールが許可されていないページについて通知するファイルです。


Search Engine Results Pages (SERPs)

Search engine results pages (SERPs), search results, or search result pages are the webpages a search engine displays in response to a search query.

Search Intent

Search intent refers to the end goal of a user who enters a search query into a search engine.

Search Term

Search term is a word or phrase that a user enters into a search engine.

Search Volume

Search volume tells how many times per month a certain keyword is searched for.


Secondary keywords are the keywords that are closely related to the primary keyword.

Secure Sockets Layer (SSL)

Secure Sockets Layer (SSL) is an internet security protocol for establishing an encrypted connection between a web server and a browser. 

Seed Keyword

A seed keyword is a one or two-word-long keyword used as the starting point of keyword research.


SEO, short for Search Engine Optimization, is the process of improving your website's visibility in search results to drive more organic visitors.

Silo Structure

Silo structure is a way of organizing a website by grouping related content together and linking only the content within the group.


A sitemap is a file that provides humans and search engines with a list of web pages, images, videos, PDFs, and any other files present on your site. 

Sitewide Link

A sitewide link is a link that appears on every page of a website except in instances where the site owner or theme developer removes them.

Skyscraper Technique

The Skyscraper technique is a link building technique wherein you identify content that has received many backlinks, create a better version, and then ask the sites linking to the previous content to link to yours instead.


Spam score is a metric for measuring the spam-likeliness of a webpage, website, or group of websites.


Spamdexing is the practice of using deceptive and unethical SEO techniques to manipulate search engine indexes and improve your rankings in search results.


Srcset is an HTML image attribute that specifies different images for different screen sizes in order to display responsive, mobile-friendly images irrespective of the screen size of the viewing device.


Structured data refers to any data created and stored in a standardized format so that both humans and machines like search engines can easily understand what it means.


A subdomain is a prefix that appears before the main domain in a URL.


A subfolder, or a subdirectory, is a folder located within a website's main domain to organize and categorize content.


Taxonomy SEO

Taxonomy SEO is the practice of classifying, arranging, and organizing a site's content in a hierarchical manner.


Technical SEO is the practice of improving the technical aspects of a website to increase its rankings and performance on search engine results pages.


TF–IDF, or Term Frequency – Inverse Document Frequency, is a statistical method for detecting the most important words in a document. 

Thin Content

Thin content refers to poorly written articles that contain little to no helpful content.

最初のバイトまでの時間 (TTFB)

Time to first byte (TTFB) measures the time between a browser requesting a webpage and the server sending the first byte of information of the requested webpage.

Top of the Funnel Content (TOFU)

トップオブザファネルコンテンツ (TOFU) とは、購入者ジャーニーの開始時点にある潜在顧客を対象としたコンテンツを指します。


トップレベル ドメイン (TLD) は、.com、.net、.org、.uk などのドメイン名の最後のテキスト セットです。



Transactional Query

A transactional query is a search query used by searchers looking to complete a transaction or purchase an item but yet to decide where to get the item from.


TrustRank is an algorithm that Yahoo and Google use to differentiate good and bad (spam) websites.


UGC Link Attribute

The UGC link attribute rel= "ugc" is used to indicate that a link was uploaded to a site by a user or visitor.

Universal Search

Universal Search is the ability of a search engine to include images, videos, news, maps, books, rich snippets, knowledge panels, and other content types in the search results apart from the regular text-based 10 blue links.

Unnatural Links

Links created to manipulate search engines and increase a site’s rankings in search results.

URL Inspection Tool

The URL Inspection tool is a Google Search Console feature for checking the index status and other information about your webpage.

URL Rating (UR)

URL Rating is an SEO metric developed by Ahrefs that measures the strength of a page's backlink profile. 

URL Structure

URL structure refers to how your URL appears to human users and search engines.

User Experience

User experience is the term for describing how a person feels while using a product, service, website, web app, or software. 


A user-agent is a string of text, numbers, and symbols that contains the details of the browser accessing a website.


Vertical Search

Vertical search is the term for describing specialized search engines that focus on a specific industry or a specific type of search result.


The viewport is the visible area of a webpage.

Voice Search

Voice search is a technology that enables users to search for information by speaking their queries instead of typing them.


Web 2.0

Web 2.0 refers to the second generation of the internet, which allows visitors to create, collaborate, and contribute to content.

Web 3.0

Web 3.0, or Web3, is a vision for the next iteration of the internet that focuses on decentralizing data storage, better privacy controls, and ownership of the data.


Web Stories is a format for displaying visually rich and interactive content in Google Search and Discover. 

Website Authority

Website authority is an estimate of how reputable and influential a website is. The higher a site’s website authority, the higher its likelihood of appearing in search results, as they have more trust and visibility. 


Webspam, also called spamdexing or black hat SEO, refers to spamming and manipulating search engines to improve your rankings in search results.

White Hat SEO

White Hat SEO refers to search engine optimization (SEO) tactics that follow the guidelines specified by search engines.



The X-Robots-Tag is a part of the HTTP response header that tells search engines how to crawl and index a webpage.


An XML sitemap is a file that contains the links to the content, attachments, taxonomies, and other files on a site. 


Zero-Click Searches

ゼロクリック検索とは、検索エンジンが検索結果の上部にあるナレッジ パネルまたはリッチ スニペットに回答を表示したため、訪問者が Web ページをクリックせずに終了する Web 検索です。


ゾンビ ページは、検索エンジンからの人的トラフィックをほとんど、またはまったく生成しない Web ページです。
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