Facebook does a great job letting you share images and silly political rhetoric with your friends. The things you post on Facebook tend to be less candid and a bit more serious. Compare that to Snapchat which takes a less serious tone, unsurprisingly the app that was created to share nudie pics attracted more silly and candid behavior. Facebook is like a photo album, you only want to share the good parts because that’s how you want to be remembered. Snapchat has no concept of history, it lets you live in the moment and so it’s more akin to what happens in between each picture you share on Facebook.