There’s a lot of power under the hood in Photoshop. One of the keys to that power is layers – and it’s important to use them in order to get even more out of Photoshop. With layers you work on top of (or on) copies of that photo, and – ultimately – have more control in terms of blending, opacity, and masking.
The bottom line is that layers are a tremendous asset. And Cult of Mac Deals is offering you a ton of Photoshop layers for just $20 with The Ultimate Photoshop Layers Bundle.