If you're good at remembering your current directory name, the computer you're logged in to, your current login name, and more - and, if you never leave your terminal for long - maybe that prompt is enough.
But I forget that kind of stuff. I log in quite a few places and I
get interrupted a lot. Without more information in my prompt, I'd
always be trying to figure out where I am - typing
I've changed my prompt to give me the information I need. My prompt can't do everything I want (at least, not on the C shell), but it makes life a lot easier.
Besides, playing around with your prompt can be fun . It's one of the most popular UNIX games, especially for newcomers.
This chapter should get you started. The first few articles cover basics. The rest of the articles show some different prompts and how to make them. Play around. See what works best for you.