Excerpt from this article:
The history of social apps has almost entirely been about taking linearly time sorted feeds of user content and turning them into a combined newsfeed experience unique for every user: Facebook, Twitter, Youtube, Instagram. This has created a perverse environment where users are thrust into a social-proof arms race: they want to share cooler and more awesome stuff than their peers. Facebook turns into posts about job promotions, exotic vacations, kids’ accomplishments. Twitter is a competition to write the most retweeted witticisms. Instagram is the 9th circle of hell where everyone feels inadequate about their photos of bottle service, Michelin star dining and helicopter rides.
Snapchat removes this. There’s no combined feed. If someone wants to look at your shit, they have to click on you. There’s no public view count, follower count, likes count, or any other social dick-measuring contest. You can just put whatever you’re doing on Snapchat; if people don’t like it, who gives a fuck, you’ll never know. There’s no expectation of balling out 24/7.
Consequently, on Snapchat I’ll post to my daily Story almost twice as much as I’ll post to Twitter and Facebook combined to reach only a fraction of the number of people. The cost of content creation is extremely low, and Snapchat makes it fun to think about what aspects of what I’m doing every day might be cool for other people to see.