How does “You may know this person” work on Instagram?

Question

Instagram

Like, I go to a person's profile, then he goes to mine, and both of us get the notice "You may know this person"?

Answer 1

It is unlikely that this algorithm will become public. It depends on the imagination of the insta developers. Therefore, one can only guess. So the question cannot be answered unambiguously. In addition, today the algorithm can be one, and tomorrow - already another, without any notification.
It could be like this: You looked at profile A, then person A looked at profile B, then person B looked at your profile. Any of A or B can be a sign. Or, for example, you and X have the same or similar ip (this could be a neighbor or colleague).