Twitter is a microblogging service that allows people to communicate and stay in touch through the exchange of quick, frequent answers to the question, "what are you doing?" Answers must be under 140 characters in length and can be sent via text, instant message, or the web.
Twitter has grown rapidly over recent years, with 50 million tweets sent per day in 2010.
Use Twitter to post information about what you're working on a particular day, snippets of news about your charity, or links to interesting articles or websites you've found. The Twitter website has lots of useful tips, including this beginners tutorial. Probably the best way of learning about Twitter is to follow other users.
Even if you don't know yet whether you want to use the service, it's worth registering your charity or social enterprise on Twitter to reserve the Twitter URL for your organisation's name.
Many charities now use Twitter as a channel for posting new stories. Click here to follow The Horse Trust's twitter feed, which was created and is regularly updated by Acorn PR.