The most often discussed metric about one’s Internet connection is how ‘fast’ it is as measured by the various speed tests out there.
What is often overlooked is a more relevant question: How effective is my internet connection? 

These articles cover the various topics related to the speed and effectiveness of ones internet.

Speed and Quality article describes the various elements that can impact these metrics and discusses the impacts of latency

Speed Test Evaluation article covers what information is relevant in those tests

Finally, a short thought piece on Quick vs Fast