[iTunes] Itunes song tags

[James Paul Manley]

I have been looking up all the info on all my 1000 songs to fill in  
all the tags but I don't know what grouping is or part of a  
compilation & BPM. I know that is beats per minute but where do I  
find that info..

Is someone knows what these are & where to find the info please let  
me know.
---
James Paul Manley
Albuquerque, New Mexico

Jim Manley's Photoshop Elements Page
http://www.geocities.com/jim_p_manley/index.html

Jim Manley's Photo Retouching Page
http://web.mac.com/jamespmanley