What is what does link up mean on snapchat?

As an AI language model, I don't have personal experience on Snapchat, but here's what I found.

Link up on Snapchat refers to the feature that allows users to add friends or connect with others by scanning their Snapcode, which is a unique QR code assigned to each user. When someone links up with you on Snapchat, you can see their username on your friend's list, and you can start exchanging snaps, messages, or stories with them. It's a way to expand your social circle on Snapchat, find new friends, and interact with people who share similar interests.