Hello,
Twitter is a free social networking and micro-blogging service that was originally launched in March of 2006 and has since grown into a real-time short messaging service that works over multiple networks and devices. Twitter enables users to stay in touch and share information with each other in real time. Users can use a maximum of 140 characters per message or “tweet” as they are called. You can tweet as little or as often as you want, as long as each individual tweet does not exceed 140 characters.
Once you have joined Twitter, you can use their search tool to find specific people, companies, and their tweets. Hashtags are an effective method of allowing users to sort topics into useful categories to revisit later. Hashtags are a community-driven convention for users to provide add additional context and other relevant info to their tweets. The basic structure of a hashtag is simple: it’s the pound sign (#) followed by an acronym or word.
Twitter didn’t itself create hashtags; they were borrowed from IRCs (i.e. Internet Relay Channels such as chat rooms). Rather, the Twitter community adopted them as a means of creating “groupings” on the service without having to alter the basic service itself.
The Twitter community uses a hashtag in front of frequently used terms in order to categorize them for searches and filtering. So, when talking about an iPod for example, people might also reference “#Apple.” If you’re looking for company specific news that’s happened recently or what’s being said about a company’s product, the hashtags can be very helpful.
Using hashtags to search Twitter for specific information is now even easier since the company purchased the search engine Summize in July of 2008. Twitter can now track hashtags itself at search.twitter.com. The engine tracks keywords too, which makes hashtags not quite as necessary for trend tracking as they were in the past. Nonetheless, they still possess unique advantages. For example, you know that anyone tagging their tweet with one of these acronyms means for it to get categorized within that topic. It also serves as a visual indicator to others following their Twitter stream that they’re tweeting about a particular subject.