A filter is what we call the word that Tweatspace looks for to identify your project tweets. They all start with a carat, like this:
The carat (^) tells Tweatspace what you're talking about. In this case I've sent a message reminding Tweatspace that I love it. Sometimes we forget to say things like that. Call your mother.
Your filter can be anything you want. It can be your company name, or an abbreviation, a product code, or anything else you like. There's one catch though: Filter names must be unique. If someone else has already taken ^superawesomefilter, then you've got to come up with something else. Them's the breaks.
If you've got a handle on this, then we can talk about the other main part of Tweatspace messages, called Threads →