An SEO audit is a structured review of a website's technical health, content and links that ends in a prioritised list of what to fix first. A good one tells you what is broken, why it matters for your leads or sales and what each fix would take. A poor one is an automated report with a sales call attached.
The word covers everything from a free tool's crawl, run in a minute, to a two-week review by a person who reads your pages. Ask which one you are being offered and what the output looks like.
