The green box on Snapchat indicates that a user has received a Snap from a friend or follower.
When a user receives a Snap, the Snapchat app will display a green box next to the name of the friend or follower who sent the Snap.
This alerts the user that they have a new Snap waiting for them.
If you see a green box on Snapchat next to someone’s name, it means that they have sent you a Snap.
You can view the Snap by swiping right on your screen to open the Snapchat app. The Snap will be waiting for you in the app, and you can view it and reply with a Snap of your own if you want to.
The green box on Snapchat is not related to the user’s friendship status on the app.
Even if you are still friends with the user who sent you the Snap, the green box will still appear next to their name to indicate that they have sent you a Snap.
The green box only indicates that you have received a new Snap, not whether or not you are friends with the person who sent it.