What are metrics and why do they matter?
Generally speaking, metrics are simply quantitative measures used for comparing, tracking, and understanding the performance of a specific process. They are highly beneficial because they help us evaluate our progress and overall efficiency, or simply put β tell us where our problems are so that we can focus on fixing them.
Okay, but do we need them for our web pages and applications?
The short answer is β yes.
Actually, measuring our website performance has never been more important since nowadays the users are very demanding β they want high-resolution graphics, interactive design, and extremely fast loading speeds. And as a matter of fact, how are we going to know if our website is functioning properly or if we need improvements if we donβt look at the numbers? Let's take a look at some of the statistics regarding user experience and satisfaction.

There exist many web performance-related metrics that can measure our webpage or application performance, but the most crucial and commonly utilized ones are: