Many things you can do through automation. Obviously you can attach them to a door or window and provide notification feedback as to when the door or window are opened. You can use the “Add automation” to turn on or off lights when the sensor is opened or closed. You can use the IDE, login link here using your Samsung or ADT credentials → https://account.smartthings.com/
Here is a good thread to learn about automation and an embedded thread to learn about webcore: