The community shares over 80 million videos and photos per day, transporting users to a desert ghost town in Namibian, the white pools in Turkey and the surface of dwarf planet Pluto.

It took nine months for the photo-sharing app to rack up its latest 100 million users, Instagram said in a blog post on Tuesday.

The 400 million mark of Instagram’s monthly active users leaves the Twitter Inc (NYSE:TWTR) user base far behind.

There has also been an increase of “blogshop” Instagram accounts, largely because it is easy to use with features such as “tagging” and “explore”, which increase user interactivity. Now, they continue to improve Instagram, helping users experience the world through images and connect with others through shared passions. Leading social network, Facebook, are now looking for a means to monetize the app it purchased in 2012 for $1 billion.

As per new sources, Instagram is celebrating passing 400 million users milestone, which is more than population of USA and United Kingdom combined together. Indonesia, Japan and Brazil are the three countries with most Instagrammers. Instagram is populated by quite a few celebrities, some of the more recent ones including names like Caitlyn Jenner and David Beckham.

Instagram-owner Facebook FB -2.71% hasn’t struggled in the area of user growth for quite some time.

Instagram has enjoyed constant growth since it was launched in 2010 as a free mobile service app. It was eventually acquired by Facebook in 2012. The application controversially ramped up its advertising platform recently, in order to allow marketers greater access to users.

With ad revenue from Instagram forecast by eMarketer to reach about $1.5 billion in 2016, growing to $2.8 billion in 2017, the site’s money-making potential is huge.