Written for how recruiters search, which is not how an ATS reads.
A resume is read once, by someone who already has it. A LinkedIn profile is searched, by people who do not know you exist yet. Those are different jobs, and a profile that is just your resume pasted in does neither of them well.
This rewrites your profile from your master resume, for the way recruiters actually search.

No retyping. The guide is generated from the document you have already built.
Headline, About and each experience entry, built around the vocabulary recruiters put into LinkedIn rather than the keywords a resume parser indexes.
The guide is laid out to match LinkedIn’s own fields, so updating the profile is a sitting rather than a project.
LinkedIn Optimization reads from your master resume, so build that first. It's free, and you read the whole thing before deciding anything.
Start with my resume