As a webmaster, I noticed that CGI are loading a lot the Web Servers as they are called each time the page is called by a user. WebLife is building or updating HTML pages and replacing some tokens by data.↵
Of course, this system is only useful for such kind of data that are not changing all the time (or from time to time only), a good example is the list of recent pages, the date, advertising, picture, links, sentences. It's changing only once a day so that it's better to create every day a page with the actual date or datas. The web server will always serve the same page without needing CGI.↵
Where is the user manual?
The documentation is in the software, you can view it via the Apple Menu or via standad help menu.