All cameras have the ability to capture in the JPG format. You can shoot and upload your work online or make prints without doing any additional work.
Photographing in Raw format allows much more control. Raw is a file format that preserves all the original data, unlike the JPG which uses compression. The Raw format has to be processed using special software, readily available in Photoshop. The advantage is you can adjust exposure, hue, saturation, sharpening, contrast, and other image parameters before you upload the work or make a print without destroying your original.
This does require extra time and it requires basic software skills. Sometimes software that processes Raw files comes with your camera, or you can use a free version through Adobe Photoshop. If you like this type of control, be advised that capturing in Raw format may only be available on advanced sub-compact cameras or mid-size/prosumer cameras. Almost all digital SLRs have this capability. It's another feature worth considering.