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Download speed is the rate at which you download a file from internet
Upload speed is the rate at which one can upload a file/pic/video on internet.
Ping test is peformed when a user intents to check if a specific website or IP is available on internet and responds to any incoming request or not.
Throughput is the amount of data that can be transferred over your Internet connection at one point in time.
kbps or Kilo Bits Per Second is the rate at which 1000 bits of data travels across your internet connection. A bit is the smallest unit of digital information. 8 bits make up 1 byte.
The test shows the current throughput you can get on your Internet connection. Factors such as network congestion and other downloads in progress can affect the available throughput.