What is TCL or Transaction Control Command in SQL Server

Transaction Control (TCL)

TCL Statements are used to Manage the changes Made by DML Statements.  

 It allows statements to be Grouped Together into Logical Transactions.

Examples:

COMMIT

Saves  After  Finished

ROLLBACK

Restore Database to Original Since the Last COMMIT

SAVEPOINT

Identify a Point in a Transaction

SET TRANSACTION

Change Transaction Like Isolation level.