After months of hard work, we're at a point where almost all 100 million people around the world on Facebook are using the new design. As we continue to roll this out, I wanted to take a moment to reflect on what we've built and why I think it's an important step for us.

Facebook's mission is to give people the power to share and make the world more open and connected. In the last four years, we've built new products that help people share more, such as photos, videos, groups, events, Wall posts, status updates and so on.

As people share more, sometimes we need to change the site to accommodate how much information people are posting. Back in 2006 we launched News Feed, which brought all of the most recent and interesting activity from the people you care about right to your home page. Similarly, the new Facebook design replaces all the big boxes on profiles and brings all of your friends' most recent and interesting activity to front and center.

We realize that change can be difficult though. Many people disliked News Feed at first because it changed their home page and how they shared information. Now it's one of the most important parts of Facebook. We think the new design can have the same effect.

With this release, we've worked harder to get more feedback about what we can improve. Starting in March, we created a Page where we gave updates on the changes we were considering and more than 150,000 people joined and participated. We also wanted to give people a chance to try out the new design before launching it for everyone. More than 40 million people tried it out and 30 million continued using it.

It's tempting to say that we should just support both designs, but this isn't as simple as it sounds. Supporting two versions is a huge amount of work for our small team, and it would mean that going forward we would have to build everything twice. If we did that then neither version would get our full attention.

That said, Facebook is a work in progress. We constantly try to improve things and we understand that our work isn't perfect. We appreciate the thousands of you who have written in to give us feedback. Even if you're joining a group to express things you don't like about the new design, you're giving us important feedback and you're sharing your voice, which is what Facebook is all about.

Thanks for all of your support as we work together to make Facebook better and give everyone around the world a new way to connect and share. The active community on Facebook makes it possible for us to build new things and make them great, and that is why Facebook has been successful so far.