What is a Hash tag:
A HASHTAG is a short link preceded by the pound sign #, used in social media. They have become an integral to on-line communications. It is important to know how to use them for your business and marketing yourself and/ or your brand and business.
On Twitter, the # (pound sign) turns any word or group of connected words that directly follow it, into a searchable link. This allows for organization of content and the ability to track discussion topics bases on the keywords. For example you want to post about what's going on on The Voice, you would include #TheVoice in your tweet to join the conversation. You can also search on a # on Twitter. In the Search box at the top type in #theVoice to see all the posts that mention the subject in real time.