Module 2 · Lesson 2
Advanced Primary & Secondary Category Selection
Your primary category is the single most important optimisation you control on your GBP. Google uses it to decide which searches to enter you into. Get this wrong and you'll rank for the wrong things — or not rank at all.
Why Primary Category Matters So Much
Think of it as Google's first impression of your business. It determines your baseline relevance for searches. A plumber who chooses "Heating Contractor" as their primary category will struggle to rank for "plumber near me" — even if plumbing is 90% of their work.
How to Find the Right Primary Category
- Search for your main service in your town on Google
- Look at the businesses in the top 3 Map Pack results
- Click into their profiles and look at their category (shown on the listing)
- The most common category among top-rankers is usually the right choice
You can also start typing your trade in the GBP category field and see what suggestions come up. Always choose the most specific category available, not the broadest.
Secondary Categories
Secondary categories add additional relevance signals. A plumber might add "Emergency plumber", "Boiler installation service", and "Gas engineer". This lets you appear in more searches without diluting your main category.
- Add 3–5 secondary categories — ones that reflect real services you offer
- Don't add categories for services you don't provide
- Don't add so many that they dilute your main signal
Common Mistakes
- Choosing too broad a category (e.g. "Contractor" instead of "Plumber")
- Choosing the wrong category entirely because it sounded right
- Changing your primary category frequently — this resets your ranking signals
- Adding irrelevant secondary categories hoping to rank for more things