Local Services Ads were designed for a specific kind of business: one that a customer hires to come do work in person, locally. That focus is why the eligible list is curated rather than open to everyone. An online-only store or a national SaaS company would not fit; a plumber who drives to your house does.
The eligible industries fall into two broad buckets: home services (which carry the Google Guaranteed badge) and certain professional service categories (which carry the Google Screened badge). Which bucket you fall in — and whether you are eligible at all — depends on your industry and your location.
