Reference
SEO Glossary
Definitions for the terms, frameworks, and metrics used across case studies, experiments, and concepts on this site. Each entry links to the research that puts it in context.
17 Terms
A
C
Content Cluster
A group of interlinked pages that collectively covers a topic area — typically a central pillar page plus supporting pages each addressing a specific subtopic.
Content Pruning
The deliberate removal, consolidation, or noindexing of low-value, thin, or duplicate content to improve a site's overall quality signal in Google's eyes.
Content Velocity
The pace at which new content is published on a domain over time — a signal of editorial activity, growth intent, and site health when evaluated alongside content quality.
Core Update
A broad, algorithm-wide change by Google that re-evaluates how pages are assessed for quality and relevance — capable of causing significant, widespread ranking changes across verticals.
D
Digital Asset
A revenue-generating website with documented SEO equity, organic traffic, and audience — evaluated and transacted as a business acquisition, not just a domain purchase.
Domain Rating
Ahrefs' proprietary metric (0–100 logarithmic scale) measuring the overall strength of a domain's backlink profile relative to all other domains in the Ahrefs index.
E
H
I
L
R
S
Search Intent
The underlying goal behind a search query — informational, navigational, commercial, or transactional — that determines what type of content Google surfaces and what type of page can realistically rank.
Semantic Coverage
The completeness with which a domain addresses the full range of queries, subtopics, and related entities within a subject area — the breadth dimension of topical authority.
Site-Level Authority
A domain's overall trust and ranking strength as a whole — distinct from any single page's authority — built through topical coherence, editorial history, link quality, and sustained content investment.