In the past, people have looked at photos as a record of memory. The focus has been on the past tense. With Instagram, the focus is on the present tense.

Videos are a very difficult medium to be good at and also a difficult medium to consume quickly.

Calling 'Instagram' a photo-sharing app is like calling a newspaper a letter-sharing book, or a Mozart grand era symphony a series of notes. 'Instagram' is less about the medium and more about the network.

Our goal is really to make sure that 'Instagram', whether you're a celebrity or not, is a safe place and that the content that gets posted is something that's appropriate for teens and also for adults.

There are really two things that have to occur in order for a new technology to be affordable to the mass market. One is you need economies of scale. The other is you need to iterate on the design. You need to go through a few versions.

Social media for the majority of companies is not about helping customers or improving products.

Technology has very little to do with what I do. I have a purpose built studio but all I need for writing is my piano and a cassette recorder as I still use cassettes.

I think that the Internet - and I do love the free flow of ideas on the 'Net - is like the wild west of the information world.