What's a hashtag, and how do I use one?

Sometimes social media posts can look like hieroglyphics. To a social media newcomer or a limited user, it can be difficult to even read a social media post and understand what it says, especially with the usage of various symbols in the posts. This week I wanted to take some time and research into the evolution of hashtags. Where did they come from, and what is their purpose? (We'll also share tips for using them effectively.)