Perform Comprehensive SEO Audits

Diagnoses, explains, and prioritizes SEO issues affecting organic visibility as an SEO diagnostic specialist - identifying problems rather than implementing fixes unless explicitly requested - producing evidence-based, scoped, actionable findings backed by a weighted SEO Health Index.

Use this skill when auditing crawlability and indexation, technical SEO foundations, on-page optimization, or content quality and E-E-A-T signals, and when a normalized score is needed to communicate severity and track improvement over time. Not a fit for implementing the fixes directly (that's explicitly out of scope unless requested), or for page-creation scaling, structured-data implementation, or conversion optimization, which route to dedicated related skills once the audit is accepted.

Before a full audit, clarifies business context (site type, SEO goal, target markets), SEO focus (full site vs section, technical/on-page/content, desktop/mobile), and data access (Search Console, Analytics, known issues) - stating assumptions explicitly if context is missing. The audit framework runs in priority order: crawlability and indexation, technical foundations, on-page optimization, content quality and E-E-A-T, and authority and trust signals.

Technical checks cover robots.txt blocking and sitemap references, XML sitemap validity and canonical-URL-only content, site architecture (3-click depth, no orphaned URLs), crawl efficiency for large sites (parameter handling, faceted navigation, pagination), indexation coverage and common issues (incorrect noindex, canonical conflicts, redirect chains, soft 404s), canonicalization consistency (HTTPS, www/non-www, trailing slash), Core Web Vitals thresholds (LCP under 2.5s, INP under 200ms, CLS under 0.1) and their contributing factors, mobile-friendliness, and HTTPS/security signals. On-page checks cover title tags, meta descriptions, heading structure, content optimization against search intent, image optimization, and internal linking.

Every finding requires seven mandatory fields: Issue, Category, Evidence (objective proof, never intuition), Severity (Critical/High/Medium/Low), Confidence (High/Medium/Low, which scales the score deduction 100%/50%/25%), Why It Matters, Score Impact, and Recommendation (without implementation steps unless requested). The SEO Health Index is a weighted composite (0-100) across five categories - Crawlability & Indexation (30), Technical Foundations (25), On-Page (20), Content Quality & E-E-A-T (15), Authority & Trust (10) - each starting at 100 and deducting per-issue severity points scaled by confidence, then classified into five health bands from Excellent (90-100) to Critical (below 40). The prioritized action plan groups findings into critical blockers, high-impact improvements, quick wins, and longer-term opportunities, each referencing the findings that justify it and an expected score-recovery range.

Uses external tools strictly as evidence sources, never as standalone authority: Google Search Console for coverage/CWV/indexing data, PageSpeed Insights for field vs lab metrics, crawlers for URL discovery and metadata validation, and log analysis for crawl behavior - always interpreted rather than reported as a raw tool score.

SEO practitioners and consultants who need a rigorous, evidence-backed audit with a defensible score rather than a checklist of generic best-practice claims or an opaque single-number SEO grade.

SEO Health Index = Sum(Category Score x Category Weight), rounded to nearest whole number