When looking to buy a car there are a few good websites that you can use. The biggest one is cars.com. They have pretty much car dealerships in every big city in the United States. Once you find a car you like you can go there and check it out.
Lets say you want to go shopping for a new car but don't know which type of car to start from. You want to know if it has a good miles per gallon. cars.com can do the trick for you as well. They describe what kind of feature the car you are looking has, its performance, and more. They have numerous pictures of the car you like and some even have videos.
If you ever get up and don't know what car you want with the performance and specs you are looking for then go to cars.com for more help.