Historically (does Twitter have a history?),Twitter has been used to follow a person/group/product (ex. @nnlmntc). You can also post, follow and search for tweets using a hashtag (ex. #medlibs or #pubmed).
Another use of Twitter is to use it to attend a real-time Twitter chat (or Tweet Chat).
The image below shows a screenshot of the #medlibs archived sessions. Click on the photo to view a larger/clearer image.
How Does it Work?
At the day and time of the scheduled chat the designated moderator will begin the chat. If it’s your first time attending a chat, watch to see how people enter their responses to the posed questions. The image below shows an example of a common approach where participants respond to the moderator’s question (ex. Q1) with their answer in the format: Q1 and then continue to type an answer in 140 characters or less. Make sure to include the group’s hashtag in your response. People follow hashtags and that is how your comment will be seen by the intended audience.
Click on the photo below to view a larger/clearer image.
Here are two sites with a list of librarian hashtags:
There’s a Twitter Chat for That