What does a hashtag do?

A Twitter hashtag ties the conversations of different users into one stream, which you can find by searching the hastag in Twitter Search.or by using a third-party monitoring tool such as HootSuite.

How do you create a hashtag?

Hashtags are simply text, and they can be placed in the beginning, middle, or end of a tweet. Just decide on the keyword you are targeting, place a hashtag sign in front of it,

https://twitter.com/search
https://search.twitter.com/

How to Use Hashtags With Twitter:-

Twitter, Google+, Instagram, Pinterest, and many other social sites use hashtags to create instant connections with other users. When another user uses hashtags to find a particular word, they will see all posts containing that hashtagged word.Hashtags are one of the most important and efficient ways of organizing information on Twitter.

Include an existing hashtag in your tweet:

You can do this simply by typing a phrase of the form “#topic” within your tweet. After you click “Tweet,” your tweet will appear in your list of tweets with the hashtag in blue type. Scroll over the hashtag and click on it to go to the page for that hashtag. Your tweet will now appear when other users visit the hashtag page.