This checklist fits Web Design Agencies with 5-50 person teams and annual revenue between $500K and $5M that already operate a live site but need a repeatable way to prove whether search-critical release work is actually complete. Larger 200+ person agencies can also use it as a cross-team QA record, while still routing specialized defects to the people qualified to diagnose them.
Start with the SEO audit guide when the site first needs diagnosis, prioritization, and problem discovery. Use this checklist once a team needs acceptance criteria for implementation. Every recorded item should identify the evidence inspected, the pass/fail condition, the severity if it fails, the accountable owner, the corrective action, and the validation performed after the change. The workflow assumes basic CMS and layout familiarity. Set aside 4-8 hours during weeks 1-2 for a coordinated review so design, development, content, and marketing can resolve dependencies in the same release process.
Required record for every check: save the artifact that was inspected, explain the observed condition, mark the decision, describe the consequence if the defect remains, assign the person who will correct it, state the narrowest fix that addresses the cause, and document how the published result was rechecked. A subjective impression is not enough; a teammate should be able to repeat the validation and reach the same conclusion.