What is it, What does it Do and How do you Connect it?
A Video card is used to send information to your monitor from the motherboard and main computer. These can be high quality and have a good, fast, clean picture or they can be less good and have a worse picture which may become slow. USually, there is a video card embedded in the motherboard and an exterior exit so you can plug your monitor into it. You can also have multiple video cards in one computer to use to monitors and be able to drag things to and fro them. Except for some embedded wireless ones, Video cards are necessary to be able to see things on your monitor
Explaining Video Cards, their Features and Functions