Many people using Twitter as a successful marketing tool. Some people using it to express their view and join as discussion community. But this post is not about why people use Twitter. Let's get to the point.

The # symbol, called a hash-tag, is used to categorize messages, mark keywords or topics in a Tweet.

Where to use Hash-tags ?

People use the hash-tag symbol # before a relevant keyword or phrase (no spaces) in their Tweet to categorize those Tweets and help them show more easily in Twitter Search.

Clicking on a hash tagged word in any message shows you all other Tweets marked with that keyword.

Hash-tags can occur anywhere in the Tweet – at the beginning, middle, or end.

Hash-tagged words that become very popular are often Trending Topics.

A hash tag is simply a way for people to search for tweets that have a common topic.For example, if you search on #FIND (or #Find or #find, because it's not case-sensitive),

In a way, hash tags allow you to create communities of people interested in the same topic by making it easier for them to find and share info related to it.

How to use hash-tags correctly:

If you Tweet with a hash-tag on a public account, anyone who does a search for that hash-tag may find your Tweet

Don't #spam #with #hash-tags. Don't over-tag a single Tweet. (Best practices recommend using no more than 2 hash-tags per Tweet.)

Use hash-tags only on Tweets relevant to the topic