1 Billion is a big number, and it positions Instagram behind Facebook (1.4 billion) but ahead of most other social network sites, including Twitter (who has 68 million) and Pinterest (250 million). That audience is continually and steadily growing, so there are a lot of audience members you can connect with here. Source

So how powerful are Instagram influencers for marketing? Let’s just say you’d be out of touch if you didn’t use the network to work with brands. In fact, Zine discovered almost 80% of influencers prefer Instagram for brand collaborations over any other channel. What’s even more compelling about this report is the next highest channel is through blogging at only 16%! For brands wanting to collaborate with influencers, the very first step should be Instagram. Even if you’re looking to promote across other channels, find your influencers through Instagram first. Source

Instagram demographics have veered toward younger generations since its inception. However, new statistics from the Pew social media report show older generations are starting to embrace the app a bit more.

Instagram is a mobile platform and since 80% of social media browsing takes place on mobile devices there should be no doubt in your mind about building a presence on this platform. Users can view Instagram as a web page but can only post photos from their mobile devices.