The interpretation and usage are always up to you, like most Twitter lingo, but the basic function of a hashtag is to create a single, organized feed of Tweets around each one.
Nkọwa na ojiji bụ mgbe niile gị, dị ka ọtụtụ Twitter lingo , mana ọrụ kachasị mkpa nke hashtag bụ ịmepụta otu ndepụta nke Tweets gburugburu nke ọ bụla.