It's a mechanical keyboard, meaning every key has its own switch and spring. Most modern, cheaper keyboards, have a sheet of rubber underneath them which provides the resistance and tactile feeling you're likely familiar with. A mechanical keyboard handles inputs more accurately than "rubber dome" keyboards.
This keyboard has N-Key Rollover which means that each key is scanned completely independently, regardless of how many other keys are being pressed simultaneously. Many keyboards will be unable to read inputs properly if you press 3 or more keys at a time, and will jam up, costing you precious time. This keyboard, however, will be perfectly fine, regardless of the input you give it.
This keyboard has Cherry MX Green clone switches, meaning you can both feel and hear when your keys respond to your touch. They feel very responsive and offer a little more feedback than the Cherry MX Blue clone switches used in other similarly-priced keyboards.
This keyboard comes with red backlighting, which is quite rare in a keyboard in the price range, even if red is the only color it comes with. A cosmetic pro, but a pro nonetheless.
These keys are engraved via laser, which makes them have much more longevity than others that are simply printed on. You can use this keyboard heavily for quite some time without worrying about the faces of your keys fading.
This keyboard doesn't have a ten key (or a numpad, if you prefer), which is a downgrade for some people. However, others who are lacking in space may consider this a pro.