The # symbol, called a hashtag, is used to mark keywords or topics in a Tweet. It was created organically by Twitter users as a way to categorize messages. People use the hashtag 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 hashtagged word in any message shows you all other Tweets marked with that keyword.
Hashtags can occur anywhere in the Tweet – at the beginning, middle, or end; and can even become trending topics on Twitter.
A few key points regarding hashtags are −
If you Tweet with a hashtag on a public account, anyone who does a search for that hashtag may find your Tweet.
Don’t #spam #with #hashtags.
Don’t over-tag a single Tweet.
Use hashtags only on Tweets relevant to the topic.
There are the following prominent types and ways of using the hashtags −
Brand hashtags can be created to represent your brand consistently on Twitter. You’ll always use the same hashtag no matter what you are promoting. You create your own brand hashtag. Make it your company name, or a tagline that people know (or will know) about your business. Use it as your central business tag, that you - and your customers - can use anytime, and on any social site.
Campaign hashtags are used for each of your marketing campaigns and will have a relative short lifespan. For a campaign tag, make it a word or phrase that is unique to your shortterm contest or promotion
A trending hashtag is nothing but a very popular hashtag topic. You probably know people talking about What’s trending now?; means they are referring to the hashtags that are the most talked about right now.
Trending hashtags are changed continuously in real time. For example, a top 10 trends can set and vanish within minutes. When you see your business related trend, you can engage in it by using this tag.
These are the hashtags you can use in your posts. They are not branded and they are not used to define your business or marketing. They may or may not be trending. Content hashtags improve the SEO of your posts.
Event-based hashtags can be cool to include in a content update. An event could be anything from a local community fair, to a well-known global celebration, to a live product launch or a live webinar you’re hosting online.
If you are a locally based business, you need to connect with your local customers. Use specific geo-targeted hashtags to get your business known in your city.