If you want to be able to connect your computer to the internet, or any other computers, you'll need to have a network card.
The technology on these cards has come a long way in a very short amount of time. If you are a gamer, getting a high quality network card will help you get the best pings and the best latency. This will not only make your gameplay feel better, but, it can give you a tiny edge that shows up really fast in a first person shooter.
TIP! When picking one out be sure to check if you have enough network connections available on your motherboard. If not pick up another network to get you what you need.
Speed and needing wireless network options are another reason people get additional NIC adapters. If your motherboard only has 10/100, you may want to get a gigabit NIC, which is up to 10 times as fast as a 10/100 card. If you need wireless, you will probably have to buy a stand alone card.
Installing your network card is a really simple task. Simply remove the case of your computer, it's the left side if you have a computer tower case. Open up a slot on the case that has the same interface as the network you bought. Simply slide the card into place, mount it to the case with a screw, or snap it in depending how the case is set up, and you're finished.
If you're unsure of how to install this card, just look at how the other cards in the computer are mounted. The NIC will be mounted in the same way.