What is the difference between ; and GO in stored procedure in SQL Server?

Question

What is the difference between ; and GO in stored procedure in SQL Server ?

Actually, if I have a stored procedure in SQL server and wanna to p

Answer 1

; just ends the statement.

GO is not a statement but a command to the server to commit the current batch to the Database. It creates a stop inside the transaction.

http://msdn.microsoft.com/en-us/library/ms188037.aspx

(Update, thanks for the comments):
GO is a statement intended for the Management studio as far as I know, maybe to other tools as well.