Facebook and Twitter inundate me with reshared content from third parties that I mostly have no interest in. Snapchat in contrast is content created by people I know, and they choose to send it to me specifically.

It might be as mundane as breakfast, or a pet doing something funny, or new bedroom curtains, but it's still an update about the life of a friend. Facebook might have a rant about how awful the day at work was which is boring to read. We've all got jobs. Or a reshare of 43 things every women in her 30s hates about Thursday afternoon. Snapchat might have a picture of someone's lunch knocked onto the floor. You think "hah that sucks" and it's gone.