user of group

i like to know more about group uses

is there a good wiki page on this subject or a tut gfiving
how and when ot use it and
the advantages and disavantage

becuase i thin you cannot edit when it is part of a group

and how do you ungroup part or all the objects included inside a group ?

Thanks

Maybe you should search the wiki before you post next time. Took me literally 30 seconds to find this page.

http://wiki.blender.org/index.php/Manual/Groups_and_Parenting

i saw that page but i wanted a little more than that as i.v indicated

more example of what can be done
and what happen when you try to edit an object inside a group
or can is it equivalent to parenting ect

i 'm having some difficulting figuring out all what you can do with theses groups

i think you cannot or there are some restriction

which are not indicated in wikipage

a good tut showing all the advantages and advantages would be nice too

Thanks

Thanks