WatchandLearnPhotoshop has released another one of their free video tutorials. With this tutorial they explain the use of Layer Masks, a Photoshop feature that very useful but is often overlooked by a lot of Photoshop users.
Here is the description from WatchandLearnPhotoshop
A layer mask in Photoshop is basically a way of hiding and revealing certain parts of a layer. In this video tutorial, you’ll learn how to create, edit, delete, and modify layer masks in Photoshop.
You can watch the tutorial here