When browsing and unwanted categories are included in the results

Hello Marina. Not really sure what you are asking here. Maybe you could explain better what you mean? Are you doing your search on the App or on Desktop?

Are you aware of the filters you can use to refine your search results? Location, new/used, etc. This could cut out some unwanted listings if you weren't interested in those.

On laptop. I use the filters regularly. I am asking about excluding categories from the search results. Once you have the results is there a way to exclude categories you don't want? Or to select only the categories you do want? Not one category at a time. 

Ahh now I understand. I was thinking cats as in 4 legs and a tail!

No, there is no way to exclude some categories but allow others. You have to either view each one individually or search only within the most likely category. There are a few tricks you can use to help you refine your search to try and get the best results from your initial search if you weren't aware of those. I'll add the info from help.