Snapchat changed that perception of deleting something as bad. Online, typically you delete something if it's bad or if it's really embarrassing.

Online one day, you log in, and you realise, 'This is not me.' Everything you're posting, you're doing it in the context of everything you've posted before. Let's delete everything, save the stuff that's important, and then you only have to organise the one per cent that's worth keeping.

There's this weird thing that happens when you contribute something to a static profile. You have to worry about how this new content fits in with your online persona that's supposed to be you. It's uncomfortable and unfortunate.

The intent to preserve and capture something is very different from the urge to share, but they had become intertwined.

Technology businesses in general are susceptible to hacking. That's why you have to work really, really, really hard with law enforcement, with security experts, internal and external groups, to make sure you're paying attention and addressing security concerns.

The fun thing about Snapchat is really the surprise and the joy that comes from learning how to use it.