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.
Common gaps can appear across 3-4 areas at the same time: page targeting, location usefulness, structured data accuracy, image context, local business data, and internal navigation. The presence of a gap does not prove it caused a ranking change, so document what you observed 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.