Mobile-first indexing
Google's use of mobile content for indexing and ranking. It does not mean a separate phone-only index; content parity between views matters.
Definition and sourcesKNOWLEDGE / FROM A TO Z
Glossary
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Clear filtersMozRank
A historical name for a Moz link-related metric. Old scores should not be treated as current Google metrics or compared without checking methodology.
Definition and sourcesMozTrust
A historical Moz metric concerning link relationships to selected trusted sources. It is a vendor metric, not a Google security or trust certification.
Definition and sourcesNegative SEO
Actions intended to harm another website's visibility, such as link spam. A ranking drop alone proves no attack; investigate evidence and alternative causes.
Definition and sourcesNofollow
A rel value indicating how search engines should treat a link. Nofollow is a hint, not a reliable indexing block or access control.
Definition and sourcesNoindex directive
A directive asking supporting search engines to exclude a page from indexing. Crawlers must be able to read it; noindex does not secure confidential data.
Definition and sourcesOff-page SEO
Activities outside a website supporting recognition and signals, such as mentions and links. They should reflect genuine value rather than ranking manipulation.
Definition and sourcesOn-page SEO
Improving page content, structure and elements for users and search engines. It extends beyond placing a keyword in a heading.
Definition and sourcesOrganic search results
Search results that are not paid advertising placements. Inclusion depends on indexing and ranking systems; organic does not mean random or guaranteed.
Definition and sourcesOrphan page
A page lacking incoming internal links in the analysed structure. Sitemaps or other sources may still expose it, but discovery can be harder.
Definition and sourcesPage experience
Aspects of using a page, including performance and intrusive elements. It is not one score guaranteeing Google rankings.
Definition and sourcesPageRank
A family of methods assessing page importance through link graphs. The historical public Google Toolbar score is not a current domain-quality metric.
Definition and sourcesPartial-match anchor text
Link text containing part of a target phrase or an expanded version. Its usefulness chiefly comes from clearly describing the destination.
Definition and sourcesPeople Also Ask
A related-questions section appearing in some search results. It can reveal audience needs, but its content and availability can change.
Definition and sourcesPillar page
A page broadly covering a topic and linking detailed resources. It organises knowledge and navigation; the label alone provides no ranking advantage.
Definition and sourcesPresell pages
A historical name for article pages created primarily for SEO links. Value depends on content and intent; manipulative linking schemes violate policies.
Definition and sourcesProgrammatic SEO
Creating many pages from structured data and templates. Each page needs genuine value; mass-producing empty variations can constitute spam.
Definition and sourcesRankBrain
A Google AI system for understanding relationships between words and concepts. It is not a switch optimised through a fixed keyword density.
Definition and sourcesRanking factors
Signals search systems use to order results. Their importance depends on query and system; no complete public table of fixed weights exists.
Definition and sourcesRich results
Enhanced search-result presentations with additional information. Valid structured data can establish eligibility, but display depends on search systems.
Definition and sourcesrobots.txt
A file defining fetch rules for crawlers that follow them. It is not protection for private data. A blocked address can still appear in results; blocking does not replace authentication or noindex.
Definition and sourcesSchema
A description of data organisation and relationships. In SEO, the name often refers to Schema.org, a vocabulary of structured-data types and properties. These are different meanings; correct markup does not guarantee enhanced search results.
Definition and sourcesScreaming Frog SEO Spider
A crawler analysing technical site elements such as responses, links and metadata. Reports identify issues to assess but do not alone diagnose every traffic loss.
Definition and sourcesSearch engine results page
A search-results page containing links, ads and additional modules. Layout varies by query, device, market and experiments.
Definition and sources