Do streaks here have some meaning? Or is it just a snapchat kind of thing!

There is nothing special or any reward on long streak its just a number of days that shows your long relation with your friends through https://prossnapchatapk.com/ , i think it would be more interesting if they unlock some new features for longest streakers.

As far as I know, not really, it's just a gamification feature designed to encourage community engagement. My current streak is 64 days 🔥