We all know that Snapchat is very famous for their interesting features on their app. But many users get confused about these features. Many users are asking what does the lock mean on snapchat? Well, It is a feature that shows up when someone puts a private story on Snapchat. So when you see a lock icon on the story of a person, that means your friend has added a private story and you are added in that list of viewers who can see that private story.