A ping is a signal sent to a host that requests a response. ... The ping time, measured in milliseconds, is the round trip time for the packet to reach the host and for the response to return to the sender. Ping response times are important because they add overhead to any requests made over the Internet
Download speed refers to how many megabits of data per second it takes to download data from a server in the form of images, videos, text and more. Activities such as listening to music on Spotify, downloading large files or streaming videos on Netflix all require you to download data.
Upload speed refers to how many megabits of data per second you can send information from your computer to another device or server on the internet. While downloading information is more common, some online activities need data to travel in the opposite direction.