use of Lebel in excel

Hi dears,

Some body asked me that do u know how to use lebel or mailing lebel in excel..i never used it..so i was surprised that what is it. he told me i.e there are 100 names with addresses than how you wil work in lebel..

Can some body tell me how we can use lebel or mailing lebel in excel for a name list with adress or something..and what is this..cuz i dont know about it..

I will be thankfull to you..

Thanks