How can Boost caching help my site?

Boost is an awesome file caching solution geared towards anonymous traffic. It's one of the best ways to speed up any site. Boost does the following:
- Caching of almost all Content-Type: text/*
- Gzip support for everything that is cached
- Fine grained control of cache & cache expiration
- Multi threaded crawler to help eliminate pages not being in the cache
- Allows for your site to stay in a mostly up state while in maintenance mode
- Full support for multisites & core stats