"Internet speed" refers to how fast or slow the internet connection is. It measures how quickly data can be downloaded or uploaded on the internet. Full definition
The area is known for having some of the fastest internet speeds in the world. (datingadvice.com)
What the hell is the use of having a phone with blazing internet speed of the damn thing is dead? (tmonews.com)
Worse, all the data I'm sending to the service from my computer appears to be slowing Internet speeds on the other devices connected to my network. (rismedia.com)