On Snapchat, the yellow heart means you and that person are #1 best friends. You send the most snaps to them, and they send the most snaps to you. It shows that you both interact with each other the most on Snapchat.
The yellow heart on Snapchat means you and that person are each other’s #1 Best Friend. It shows you both send the most snaps to each other, indicating a strong and active snap relationship.