Instagram

Does anyone know about the suggested searches on Instagram? When you go to look someone up and it suggests a list of a few users. Are they people you look up a lot?
Random but me and my boyfriend got into a talk about it because his ex gf and a few other random girls were on his and he said it's nothing to do with what he's searching lol.....I'm just wondering if anyone knows how it works. I thought the suggestions are people who you look up a lot? That's how mine is at least