The four things local search rewards
Local ranking is complicated in detail and simple in outline. Google is trying to work out which nearby business is most relevant, most established and most likely to satisfy the searcher. Everything useful you can do falls into one of these buckets.
- Relevance: does your profile and site clearly say which services you do, and where?
- Proximity and coverage: is your service area described honestly and consistently?
- Prominence: reviews, mentions and links that show you are a real, active business.
- Technical health: a site that loads fast on a phone, is crawlable, and has a real page per service.