With a WiFi adapter or WiFi dongle, you can make a computer without WiFi suitable for wireless internet. You simply plug the WiFi adapter into a free USB connection on your PC. This way, you can quickly and easily set up a wireless internet connection. Does your computer only have slow WiFi? Buy a fast WiFi dongle to increase the maximum internet speed on your computer. Buy a WiFi adapter with external antenna to improve the reception of your wireless internet. The smaller models are very suitable for use in a laptop.