How To Restore Database From Stored Backup Database Using SQL Server Management Studio

This topic explains how to restore a full database backup, using SQL Server Management Studio. When we are restoring a database from other instance, we need to follow the below steps,

Copy Backup database to SQL Server or any Physical drive.
Connect to an instance of SQL Server Database Engine and then expand that instance.
Right-click Databases and select Restore Database options, as shown below.
Restore the database wizard, which will open, select the path and select backup database with .bak. Click OK.
On the file options, select Log and Database path, where you want to save.
On the Options path, leave all default or modify, as per your requirement and click OK to start the recovery of the database.
If you click OK, backup database will be shown on the connected object SSMS Server.

See more about restore from technet