This is a pretty logical next question. When you are looking at the
pricing page on most hosts, they will have charts that break down
the different packages. The problem is, some shared host packages
will just say UNLIMITED (like mentioned above).

You will have to go past these promotional pages and find the real info.
If you want to find out the real limitations and rules of your hosting
then look for pages on the site like:

1. Terms Of Service - You can usually find this page near the
bottom of the webpage you are viewing. It might be in the
footer area. It could also just be called Terms. While there is
a lot if info here, it is certainly worth reading. If you are trying
to find out the real limitations of Web Hosting. Look for
sections labelled: RESOURCE USAGE or "UNLIMITED" USAGE
POLICIES.

2. Review Sites - While you have to be careful since so many
review sites are actually thinly disguised affiliate sites, check
out web hosting reviews before you buy is a good place to
find out about fine print you may have missed.
3. Support - I recommend everyone who is researching hosting
should talk to the support team for their web host. This will
allow you to question them on their policies, as well as give
you an idea of how responsive the support team is. If you get poor support when you are looking to buy, how can you expect good support once they already have your money?