In order to deploy contract go to the contracts tab
Goto the Contract tab.
Select deploy contract then select a wallet from the dropdown.
Upload the contract is written in Michelson format.
Enter the contract label while entering the amount and initial storage, this will help you to recognize your contract with a simple name.
Note: Smart Contracts keep a state of its own permanent storage, which helps to store its state variables.
Click on deploy contract once the contract gets deployed you'll get a contract address returned like this KT1QfQ9g2zHQkbjdrfWGhbx1eLiSFWn5abLn