Instagram has its own set of challenges, which can make you wonder if it's worth your time. The most important are: 1) First and foremost, it is entirely dependent on smart phones. Instagram, unlike other sites, does not allow you to post from your phone. You can't even use third-party software to post to it. It's been specifically developed to appeal to mobile phone users. Instagram is a no-brainer in markets where smartphone use is high (which, let's face it, is virtually everywhere). 2) It's also heavily reliant on images and video. Instagram, unlike Facebook, Twitter, and even Google+, where text updates are still the standard, needs images. Text (referred to as "captions" on Instagram) is secondary, despite the fact that, unlike some other sites, Instagram's character limit is very generous. Keep in mind that photos outperform text-only notifications on other sites as well. As a result, concentrating the marketing efforts on pictures is probably