GBP categories are how Google understands what your business actually is. You pick one primary category and up to nine secondary categories from a fixed list of around 4,000 options.

The primary category is the single most important field in your entire profile. It is the dominant relevance signal Google uses for category-level queries. "Pizza Restaurant" as primary will rank you for pizza queries. "Restaurant" as primary will not.

Pick the most specific primary category that genuinely fits. If you are a Neapolitan pizzeria, "Pizza Restaurant" beats "Restaurant"; "Neapolitan Pizza Restaurant" (if it exists in the list) beats both. Specificity wins because Google's category list is hierarchical and specific categories inherit relevance for parent queries.

Secondary categories add coverage without diluting the primary. A wine-bar-with-food might pick "Wine Bar" primary and "Tapas Restaurant", "Small Plates Restaurant" secondary. Or "Tapas Restaurant" primary and "Wine Bar" secondary, depending on which type of search matters more for the business.

Wrong primary category is the single most common reason a restaurant ranks worse than it should. Many restaurants pick 'Restaurant' as primary because it is the obvious choice, missing the specific cuisine category that would unlock targeted queries. Fixing this is a five-minute, free, high-impact change.