Alf - you are to be congratulated and thanked, very much. You really hit the nail on this one. Cheers!
Perhaps even more importantly, Yuri stands behind his work, interacts on a regular basis with the community, responds to questions and fixes problems that might arise. He also encourages others to integrate other functionality that compliments this work (like Captcha and SPAM protection,etc.)
Excellent extension from a hard working, talented third party developer.
You can use it to append the name of your website in every page title. The site name can be in front of or behind the page title. There's even a homepage option that is useful to avoid "doubling" your site name in the page title. Well considered.
It's necessary for SEO and it works great.