Google Business Profile has 50+ editable fields. Four signals account for almost all the ranking weight. The other 46 are nice-to-haves that take an hour each to fill and move nothing. Focus on the four and ignore the noise.
Signal 1 — primary category
The single most important field on your GBP. The primary category tells Google what your business is. Choose wrong and no other signal saves you.
The trap: most SMBs set this once during setup, never revisit, and choose the broadest option ("Contractor" instead of "Plumber"). Broader categories sound safer; they rank worse. Pick the specific one that matches what your customers search.
For categories with multiple valid options ("Auto Glass Shop" vs "Glass Repair Service"), pick the one that exactly matches the highest-volume search term. Tools like Local Falcon or PlePer give you the ranking-weighted recommendation. We'll spend 30 minutes on this for every new account.
Signal 2 — proximity to the searcher
You can't move your business. But you can influence the radius Google ranks you within by getting other signals (categories, reviews, citations) strong enough that proximity matters less.
The myth: that GBP "service area" controls who sees you. It doesn't — proximity is decided by where the searcher is. The service area field affects whether you can show in the local pack at all, not the radius of competition.
Signal 3 — reviews (the velocity matters more than the count)
200 reviews from 2021 won't outrank 30 reviews from the last six months. Google reads cadence. Two to four new reviews a week, with replies, signals an active business. A spike of 50 in one weekend signals manipulation.
What moves rankings vs what only moves trust: keyword mentions in reviews ("they fixed our split system in Brunswick") move rankings; sentiment moves trust. Both matter. We won't recommend incentivised review schemes — Google bans them and the penalty is harsh.
Signal 4 — engagement (the activity loop)
Profile views, direction requests, calls, photo uploads — engagement signals tell Google your business is in motion. A profile that gets new photos every fortnight and replies to reviews every week outranks an identical profile that sits still.
The actions worth doing: one new photo per week (real, not stock), reply to every review within 7 days, one GBP Post per fortnight mentioning a recent job. That's the minimum cadence. Everything more is diminishing returns.
The seven signals that don't matter much
Things SMBs spend time on that move nothing measurable: GBP "Products" listings for service businesses, Q&A self-population, "From the business" description (a tiebreaker at best), social media links, opening hours format obsessing, secondary categories beyond three or four, GBP "Attributes" (wheelchair accessible, free WiFi). Fill them out once and move on.
The category-research checklist
- List your top 3 search terms : what customers type, not what you'd call yourself.
- Check the local pack for each term : note your top 3 competitors' primary category (visible via GMB Everywhere or PlePer).
- Cross-reference : the category most of your top competitors use is usually the right one.
- Test, don't permanently change : Google can flag a primary category change. Make the change once, then leave it alone for 90 days.
This is the foundation move described in the tradies SEO post and the broader local SEO techniques piece.
The takeaway
Four signals, not 50. Get the primary category exactly right, hit the review cadence, keep the engagement loop running, and you've done the work that 90% of competitors haven't. The SEO offer includes this work as the first 30 days on every local engagement.