They contact me when there's a word in my resume.
If that word isn't for instance the name of the road I live on, they parrot the job requirement and the current understanding of the remuneration, location etc.
Then I apply my lengthy experience in the market to the "opportunity" and either bin it on the spot through either me being unsuited, or it not suiting me or cautiously indicate a willingness to proceed further.
If I decide that there might be some mileage in it for me and a potential employer.
They arrange an interview for us....
Anyone thinks I'm wrong, aside from my first job, every one has been through a recruiter, and I've been out of work a grand total of two months since 1981.
Best bet for dealing with recruiters, expect very little. Trust me, you will not be disappointed.
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