Relevance Signals
Relevance signals tell Google whether your content matches what the searcher is looking for. The primary relevance signals are: keyword usage in title tags, headings, and body content; topical depth (does the page cover the subject thoroughly?); search intent match (is the content format appropriate for the query type?); and semantic relevance (does the content cover related subtopics?).
Modern Google does not just match keywords - it understands topics. A page about "SEO in Dubai" that comprehensively covers all aspects of Dubai SEO will rank for hundreds of related queries, not just the exact phrase.
Authority Signals
Authority signals tell Google how trustworthy and credible your site is. The primary authority signal is backlinks: when other quality websites link to you, they are effectively voting for your credibility. The quantity, quality, and relevance of your backlink profile is one of the strongest ranking factors.
Beyond backlinks, authority signals include: brand mentions across the web (even without links), co-citations (being mentioned alongside other recognised authorities in your field), and the author authority associated with your content (E-E-A-T).
Experience and Quality Signals
Google's "page experience" signals cover technical performance (Core Web Vitals), mobile friendliness, HTTPS security, and the absence of intrusive interstitials. These are now established ranking factors.
Quality signals include E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness), content freshness (recently updated content is favoured for time-sensitive topics), and user behaviour signals (Google monitors click-through rates and engagement patterns that suggest whether users found their answer).