Google - Android Device manager
Go to Google Play
On right top corner click Settings gear button
Choose Android Device Manager
Map will appear and system will start locating your Android device.
Ring = will ring your device at full volume for 5 minutes.
Lock = will lock your device.
Erase = will erase your data and perform factory reset.
Samsung - Find My Mobile
You can also use Samsung Find My Mobile service. Sign in with your Samsung account, then you have similar options:
Ring my device
Lock my device
Wipe my device
Find My Mobile = this is on left top corner arrow