Brak wants to know, "What is a hashtag"?

[Brak!]

BQ: What is the purpose of a hashtag anyway?

[Kayleigh]

This is a hashtag #
Purpose: for people to do stuff like this while making it sort of a link- #YOLO - also people put what they r feeling on it.

[DrZoo]

A hashtag is a form of metadata tagging. It's used for grouping messages basically. You can search a hashtag and find all messages that have that hashtag in it.

[Srdjan Solkotovic]

Its like keywords for sites, it relates to the post you just posted and points out the important factors of it, like for example : "I am at the pool #Fun #sunny #water" but most of the people misuse it or likes and follows.

[Daniel]

Hash tag is Something that was Started on Twitter Facebook does it now as well its a topic that people can click on and it will tell you who else is talking about it let's say I do #dance anyone who clicks on that can see who else is talking about that

[Miller]

A hashtag is a word or a phrase prefixed with the symbol #
It is a form of metadata tag

It is used in social networking sites like, Twitter, Facebook, Google+, tumblr, etc... It can be tagged by putting "#" before important words which helps in gaining traffic and creating awareness about our product.