Tree surgeon searches are often local and service-specific, so the useful question is not whether a site has done SEO in general. The useful question is whether a customer and a search engine can verify what work is offered, where it is genuinely offered, and how to contact the business.
Use this page as an audit sheet rather than a list of ideas. For every editable check, save the evidence you inspected, apply a pass or fail condition, record severity, name an owner, describe the corrective action, and repeat a validation step after the change. If your existing audit contains 50 possible tasks, this structure helps separate blocking issues from lower-priority refinements.
Most tree service websites miss 3-4 critical pieces at the same time, among them service area page architecture, schema markup for local services, and image optimization for portfolio work. The checks below also cover page targeting, local business data, and internal navigation, so document what you observed in each area before deciding what to fix.
The operating goal is a reproducible review. A future reviewer should be able to look at the same evidence and reach the same pass or fail decision without relying on guesswork.