>You can post pretty shamelessly the little things you're up to all day to your story, knowing it will be gone in 24 hours, keeping your feed really clean.

Snapchat is ephemeral and more private, like the spoken word, and unlike pretty much all other social media that I know of. It is an interesting concept, people feel more open to share certain things when they know it will fade away soon after rather than be on historical record .