Hashtags, which started out on Twitter, can now be used on Facebook, Instagram, Google+, Google search, and other platforms. An effective hashtag allows people to find and follow discussions about your brand, a new product or service, or an upcoming event or promotion. And ultimately, hashtags help brands monitor trends and track the performance of promotions.
A brand can experience up to a 50 percent increase in engagement when they use a hashtag. For some networks, like Instagram, posts with upwards of 11 hashtags experience the highest number of interactions.