This is important for placing images in specific areas and saving space.
Examples:
Optimal image sizes for various Web2.0 Sites CheatSheet
Most imported digital photos need a little help with color balance, brightness and contrast. Keep in mind that if you take a photo with your smartphone, much of this can be taken care of before you send the image to an editor.
Sometimes a specific type of image file is required for specific applications. Most image editors allow you to save in the common formats. Mo
Adding text to an image may be one of the most affective forms of visual communication.
Why: Pixlr is as close as you will get to free Photoshop. The other apps on the site are easy and fun.