Chapter Glossary

Chapter Glossary

Backlink

A link from one external website pointing to another. Backlinks are the primary mechanism through which authority and trust are transferred between pages in search engine ranking models.

Dofollow Link

The default state of a hyperlink, which instructs search engine crawlers to follow it and pass authority (link equity) from the linking page to the destination page.

Nofollow Attribute

An HTML attribute (rel="nofollow") originally designed to prevent authority from passing through a link. Google now treats it as a hint rather than a strict directive, meaning it may still influence crawling and indexing decisions.

Sponsored Attribute

An HTML link attribute (rel="sponsored") that explicitly identifies a link as paid or part of an advertising arrangement. Google requests this attribute on all compensated links in place of a generic nofollow.

UGC Attribute

An HTML link attribute (rel="ugc") applied to links within user-generated content such as blog comments and forum posts, signaling that the link was not editorially placed by the site owner.

Link Equity

The authority or ranking value passed from one page to another through a dofollow link. Link equity is influenced by the authority of the linking page, its relevance to the destination, and the number of other links competing for that equity on the same page.

Domain Authority

A third-party metric estimating the overall strength and trustworthiness of a domain based on its link profile. Not a Google metric, but widely used as a proxy for how much link equity a site is likely to pass.

Anchor Text

The visible, clickable text of a hyperlink. Search engines read anchor text as a relevance signal for the destination page. Unnaturally uniform or keyword-heavy anchor text patterns across many links are associated with manipulation.

Link Velocity

The rate at which a website acquires new backlinks over time. Sudden, unnatural spikes in link velocity are a pattern search engines use to identify artificial link-building campaigns.

Negative SEO

A form of competitive manipulation in which low-quality or spammy links are deliberately pointed at a competitor's site with the intent of triggering an algorithmic penalty or manual review.

Disavow

A process by which a site owner can signal to Google that certain backlinks should be ignored when assessing the site's link profile, typically used in response to manipulative or toxic links that cannot be removed.

Unlinked Brand Mention

A reference to a brand, product, or entity in web content that does not include a hyperlink. Search engines can interpret these mentions as relevance signals even without a clickable link present.

Editorial Link

A link placed voluntarily by a third-party publisher because they found the content genuinely useful or newsworthy, without any exchange of payment or reciprocal arrangement. Editorial links carry greater authority weight than requested or transactional links.

Manual Penalty

A formal action taken by a search engine's human review team against a site found to be violating webmaster guidelines, often triggered by unnatural link patterns. Distinguished from algorithmic filtering, which happens automatically.

Topical Relevance

The degree to which a linking site's subject matter aligns with the destination site's content. A link from a topically relevant source passes more meaningful authority than one from an unrelated domain, even if the linking domain has high overall authority.

Brand Authority

The ranking strength that accrues to well-known, frequently searched brands independent of their link profile. Strong brand signals can reduce a site's dependence on link volume to compete for prominent rankings.