Is there a web site that I can go to that will explain what each app available to download or buy will do? I sometimes can't tell too much from the brief description on the phone in the market as to what the function is for the app.
Can someone give me some direction?
There's usually a link below the comments "Visit Developers Website". That usually gives more information about the application. Also, you have 24 hours to change your mind about Paid apps to get a full refund.
True as others have said...Or you can also try going here-->http://www.android.com/market/
There is somewhat a better description on apps there.Plus if you just click on the developers name it'll take you straight to their web site