[In Silicon Valley] you have a bunch of internet companies in close physical proximity. They are also the top sites in the US when it comes to time spent on the web, by a very wide margin. You would think that the similarities would end there, because they all provide very different services: social networking, email, messaging, search, and video. But they have something in common. They are all write/read experience. They don’t work unless people contribute content to them. You post updates, you send emails, you type in searches, you upload videos.
Tim Berners-Lee said that his original vision for the web was a place where we could all meet and read and write.
This isn’t just a US-centric thing. Looking at the worldwide list of most popular sites, you’ve got the ones mentioned already but also Twitter and Wikipedia, where all the content is contributed by their users. Even Amazon is powered by reviews. This is what makes the web so awesome. It’s not a broadcast medium. It’s a two-way street. It’s interactive.
So what’s the biggest factor that’s changing for all of these sites? Mobile.