What do technical SEO services actually cover?
Technical SEO services deal with everything between your content and the search engine: whether the page can be crawled, whether it gets indexed, which URL is treated as the real one, and how fast it loads for a person on a phone.
Content and links get the attention, but they only work once this layer is sound. A brilliant page on a URL Google folds into another URL earns nothing.
The work splits into six connected areas — crawl and indexation, canonicalization, structured data, internal architecture, Core Web Vitals, and redirects during a migration. I treat them together, because fixing one in isolation usually moves the problem rather than solving it.

