Most of my searches are professional and about medication adverse effects, or interesting complexities in treatment that one of the fellows encounters and that I want to address in my teaching.
My next most common search is for the spelling of a word. I am not a gifted speller even though I read a lot. My grammar could use help also, right? Then I would say I search for books by title or category, or for the definition of a specific word in a book that I am reading.
When I shop online, I most often search for designers and brands I know who's items fit me well. I have learned over time which ones work best. On occasion I will do a more general search using general item type (i.e. Dress, blouse, sandals, sweater, coat, etc.) or using color or material. I try not to get too specific when I use this strategy because I have found some unexpected and wonderful new items and brands.
It's rare that I narrow my search to looking for grey leather belt, or fuschia dress, etc. When I have that type of gap, I find brick and mortar shopping a better approach.