Local Business Schema and the Google Map Pack
Search for a plumber and Google answers with three pinned businesses on a map before any normal result appears. Any honest guide to local markup starts here: the markup doesn't rank you in that box, your Google Business Profile does. What LocalBusiness JSON-LD adds is confirmation: your name, address, phone and hours stated on your own site in machine-readable form, consistent with everything else Google knows about you. This guide covers subtype selection, a worked example, NAP discipline, and the errors that make local markup worthless.