On the first day the man was depressed and wanted to share his thoughts, ideas, and feelings but had no one to tell. So the man decided to create a website where he can voice all of those things. And it won't matter if anyone reads it or no one does because the man early on decided to not look at the metrics for the site.
What he thought he was so clever in doing is naming the site with a reference to Hitchhiker's Guide to the Galaxy. Wouldn't want to spoil the movie if you haven't seen it so you'll either know, figure it out or decide you don't care enough to watch the movie or read the book.