It is one of the most prominent icon in today's social media that makes it easy for people to spot their interests.
That hash mark is now communicative in illustrating meanings accompanied by individual keywords, which briefly describe the messages, it is an emphasis used to categorize expressions to identify the context immediately.
Aside from just emphasization on social media, people would also like to use it to present a recognition for someone as a title of respect or something an appreciated name to express its abstract regards to capability.
