Facebook's growth shows no sign of stopping. Today is announced that it has over one billion users on average using it everyday. In August it announced it had passed a milestone of having one billion users on the site in a single day. By the next month that was the average. That's a year-over-year increase of 17 percent. Monthly active users increased by 14 percent to 1.55 billion as of the end of September, an increase of 14-percent from the year before. Meanwhile the company continues to see a majority (78-percent) of its ad revenue come from mobile. In the earnings statement CEO Mark Zuckerberg stated, "we're focused on innovating and investing for the long term to serve our community and connect the entire world."