TL;DR — On 25 August 2026 Search Engine Land published Whitespark’s study of 1.8 million Google Business Profiles across 4,209 categories. A specific primary category sat in the top 10 12.5% of the time versus 9.2% for a generic one. Listings that had website, description, hours, photos, and claimed status averaged rank 43 versus 62 when those five fields were empty. That is correlation, not a promise. Do not mix this with the 24 Aug reinstatement-reviews gap.
What the 25 August 2026 study actually measured
Darren Shaw (founder of Whitespark; disclosed in the article) wrote the Search Engine Land piece. The dataset is 1.8 million Google Business Profiles and 4,209 categories.
The claim is not “reviews don’t matter.” It is that category choice and profile completeness still move with local rank, before you get to review velocity.
This is not a Google Search ranking incident. Google’s ranking status history still tops out at the August 2026 spam update (started 18 Aug, lasted 2 days 16 hours). Search Central documentation updates still last-updated 2026-08-20 UTC (Preferred Sources button). Category selection is a Business Profile job.
Do not treat this post as a patch for:
- 3 Jul 2026 public reviews vanishing
- 9 Jul 2026 dashboard “You have no reviews yet”
- 24 Aug 2026 reviews missing after a suspension is reinstated
Those are separate failure modes. This one is: the listing is live, and the category + completeness layer is sloppy.
Specific primary category vs generic
Shaw’s headline comparison:
| Primary category type | Businesses | Avg rank (lower is better) | % in top 10 |
|---|---|---|---|
| Generic (Restaurant, Store, Contractor, Attorney, …) | 55,091 | 50 | 9.2% |
| Specific (everything modified) | 1,664,733 | 45.8 | 12.5% |
12.5% vs 9.2% is the “~36% higher presence in the top 10” line in the article.
For trades, the contractor cut is the useful one:
| Primary category | Avg rank | % in top 10 |
|---|---|---|
| Electrician | 48.6 | 11.2% |
| Roofing contractor | 53.1 | 12.6% |
| Plumber | 53.2 | 10.4% |
| HVAC contractor | 53.2 | 12.4% |
| Contractor (generic) | 57.7 | 8.0% |
If the work is plumbing, the primary category is Plumber, not Contractor. Same for electrician, roofing, HVAC.
Exact-match still wins the query. For “hair salons”:
| Primary category | Appearances | Avg rank | % in top 10 |
|---|---|---|---|
| Hair salon | 7,952 | 49.9 | 11.3% |
| Hairdresser | 200 | 56.9 | 6.0% |
| Beauty salon | 2,066 | 60.0 | 3.2% |
| Barber shop | 297 | 79.5 | 1.3% |
| Nail salon | 36 | 81.3 | 0.0% |
Limitation inside the same article: “specific” is not a magic word. In the restaurant cut, Tapas averaged rank 28.8 (32.1% top 10) while Pizza averaged 74.8 (1.6%) and Chinese 73.2 (0.6%) — both worse than generic Restaurant at 49.7. Crowded specific labels can still sit at the bottom. Pick the specific category that matches the job and is not the most over-used label in your town.
Additional categories: specific helps, “Service establishment” does not
After the primary, Shaw looks at additional categories. Well-chosen extras correlated with 6–17 rank positions better than primary-only listings.
Examples from the study (avg rank of the pair vs no additional category):
| Primary | Best-ranking additional | Avg rank | Vs no additional |
|---|---|---|---|
| Veterinarian | Emergency veterinarian service | 33.9 | 51.2 |
| Electrician | EV charging station contractor | 38.2 | 47.5 |
| Gym | Athletic club | 34.7 | 43.3 |
| Plumber | Drainage service | 47.3 | 54.0 |
| Roofing | Gutter service | 47.1 | 52.1 |
| Dentist | Cosmetic dentist | 47.6 | 57.6 |
Shaw is explicit: correlation is not causation. Owners who add extra categories also tend to ask for reviews and work the rest of local SEO.
The other explicit finding: Service establishment as an additional category is useless, and the data “seems to suggest that it’s harmful.” Nobody searches “service establishment near me.” Skip it.
Add extras only for work you actually do. A plumber who never touches drains should not add Drainage service to game the table.
Completeness index: five fields, not a full audit
Whitespark scored each listing 0–5, one point each for:
- A website
- A business description
- Hours of operation
- Photos
- A claimed status
They did not pull attributes, services, or products. Treat this as a floor, not a full GBP audit.
| Completeness index | Avg rank | % in top 10 |
|---|---|---|
| 0 | 62 | 4% |
| 1 | 58 | 5% |
| 2 | 54 | 7% |
| 3 | 50 | 9% |
| 4 | 47 | 11% |
| 5 | 43 | 13% |
Empty (0) to full (5): about 19 rank positions and roughly triple the top-10 rate (4% → 13%).
Home services were the most complete industry in the cut: average 4.4 / 5, 55% fully complete. That is your competitive set if you run trades or field service. A half-filled listing is not “fine because the work is good.”
Shaw’s takeaway after the table: fill every field, then maintain the profile — request reviews continuously, upload photos, publish Posts, and keep the website current. Completeness is the on-ramp. Review velocity is the ongoing signal.
Operator checklist (45 minutes, one listing)
Do this on a live, unsuspended profile. If the listing was just reinstated and the reviews are gone, stop and diagnose that gap first — do not bulk-edit categories while you are proving a restoration case.
- Screenshot primary category, additional categories, hours, website, photo count, review count, and rating.
- Primary. If it is Contractor / Store / Restaurant / Attorney / a similarly generic bucket, change it to the specific trade you sell (Plumber, Electrician, HVAC contractor, Roofing contractor, …).
- Additional. Add only services you deliver. Plumber + Drainage service is the study’s example, not a template for every trade. Remove Service establishment if it is sitting there.
- Five-field floor. Website URL that loads, description that names the actual services and city, hours including the real closed days, recent photos (job site and storefront, not stock), claimed/verified.
- Do not burst-edit name, address, phone, and category in the same hour. One change set, then wait.
- Do not burst-request reviews to “make the completeness mean something.” A drip after completed jobs is the review play — see GMB automation for service businesses and WhatsApp vs email review requests.
This is not a custom software Build. If Map Pack leads, CRM capture, and review replies are all still manual, start with a Blueprint — a 5–7 day diagnostic. The productized review loop, if you want the engine rather than a project, is Reputation Management from $180/mo.
Limitations
- Whitespark (and Shaw) say correlation ≠ causation on both additional categories and completeness.
- The completeness index is five fields. Attributes, services, products, Q&A, and Posts were not in this index.
- The full category report is “publishing soon.” This article is the SEL summary, not the full dump.
- Specific + crowded can still lose (Pizza / Chinese vs generic Restaurant in the same piece).
- Category cleanup does not restore missing historical reviews after a suspension.
- Alternatives: leave a generic primary (you compete with every contractor in town); stuff extra categories you do not deliver (misleads the query match); buy a “GBP optimization” package that only writes a description. The honest first move is specific primary + real extras + the five fields, then a review drip.
FAQ
Should I pick Contractor or Plumber as my Google Business Profile primary category?
Pick the specific trade you actually sell. In this study, generic Contractor averaged rank 57.7 and 8.0% in the top 10; Plumber averaged 53.2 / 10.4%, Electrician 48.6 / 11.2%.
Does filling out every Google Business Profile field guarantee Map Pack rank?
No. Completeness correlated with better rank (0 → avg rank 62, 4% top 10; 5 → 43, 13%). Owners with complete listings also tend to collect reviews and maintain the site.
Should I add Service establishment as an additional category?
No. The study flags it as a nothing-category that nobody searches, and the data suggests it is associated with worse rank than having no extra category.
Sources
- What 1.8 million Google Business Profiles tell us about local SEO success — Search Engine Land, Darren Shaw, 25 Aug 2026
- Latest Google Search documentation updates — last updated 2026-08-20 UTC
- Google Search ranking incident history
- The Google Business Profile Algorithm in 2026: Why Steady Review Velocity Beats Historical Count
- Google My Business Automation for Service Businesses
- Google Review & GMB Automation — VijayaTech Labs, pricing checked 26 Aug 2026