What is "download speed" and "upload speed"?

The download speed is how fast you can pull data from the server to you. Most connections are designed to download much faster than they upload, since the majority of on-line activity, like loading web pages or streaming videos, consists of downloads. Download speed is measured in megabits per second (Mbps).

The upload speed is how fast you send data from you to others. Uploading is necessary for sending big files via email, or in using video-chat to talk to someone else on-line (since you have to send your video feed to them). Upload speed is measured in megabits per second (Mbps).