It's difficult to recommend something if you don't know what you are selling and what your target audience is. But I think brand search is relevant in any business. You can read more about this extension here https://www.mageworx.com/shop-by-brand-magento-2.html . I believe that such a search is very convenient, because most often I use this search if it's on the site. I usually know what I want to order and I don’t want to search the site for a long time.