Adobe Photoshop is an extremely useful software program that allows you to edit / create images and pictures. But, some people have found different ways to use Photoshop. Like for example: A lot of website designers will make their website templates using Photoshop. Most of really cool looking websites with a bunch of different effects and twists to their design use Photoshop.
You can do so many different things with Photoshop. I'll just name a few. You can create fire, give an object a shadow and glow, make it have a chrome effect, blur a picture, change colors, and so much more. But remember, all of this does take a lot of time to learn. You can't just have Photoshop for a week and already be a pro at making things. It does take time, but if you are interested in it then I highly recommend you go ahead and learn how to use it.
I've created a good bit of images myself, but trust me I'm still not a professional at it. Here's a couple I created a while a go. Not too good, but I'm getting better =)