Just set your parameters and publish the module. You can even copy the module to multiple instances and fetch the latest tweets from different users on your website (e.g. in a multi-author environment).
Unlike other related modules, this one does not require that you create a Twitter app for your site (a quite tedious process). Instead it uses 2 "proxy" services which provide a public API to Twitter's now walled garden of APIs.
The module is released under the GNU/GPL v2 license and you can see a demo here (frontpage, left column): http://demo.joomlaworks.net
Enjoy one more fine release from JoomlaWorks!
Turning off the module returned my web site to normal.