Snapchat is a messaging app that allows users to send and receive messages with others. The app has a feature called “pinning.” When you add someone to your Snapchat account, they will be able to see a list of all the messages that you have sent and received with them. You can then drag and drop any of these messages into a new chat window or conversation. To pin someone on Snapchat, first open their Snapchat app and sign in. Then, click on the three lines in the top left corner of the main screen. This will show you a list of all your friends’ snaps. On the right side of this list, you’ll see a list of people that you are friends with. If someone is on your friend’s list but not on theirs, they will be listed as “not added.” To add them to your Snapchat account, just click on their name and sign in again. Once they are added to your Snapchat account, they can start sending and receiving messages with you by clicking on the three lines in the top left corner of their snap story or conversation.