You've seen hashtags all over Instagram. You've probably even used them (hopefully!), but do you really understand them? Hopefully I can help. Hashtags were first created on Twitter to create a way to categorize content so people could find others who are posting about the same topics. They allow for a reach beyond your current network of friends and followers to link up with others using or searching that hashtag. And hashtags, unlike categories, don't have to already exist