Google PageSpeed Insights is a testing tool for the performance of your website. Based on the tested website, Google then allocates a score and a percentile on how effective the speed of your website is. Google will also give you a list of recommendations on how you can improve your website.
While Google PageSpeed Insights is a useful tool, some site owners use its features to an extreme level. Some overlook the recommendations that Google provides them with to improve its site speed and instead focus on obtaining a 100/100 speed score on the platform. The reality is that the score is unimportant if the recommendations are not followed, as they provide you with a direct way of how you can improve your site speed. When you use other speed-tracking platforms such as GTmetrix and WebPageTest, they are likely to give you differing scores, demonstrating how your score is not as important as the recommendations of Google.
There are many reasons why a page might be loading slower than expected:
Two of the main factors that affect your Page speed are your Field Data and Lab Data. Both of these can determine the speed of your website. However, they do have some differences. Field Data is made of the real loading speeds of your website over a certain amount of time while Lab Data shows the speed when a simulated page load is executed. When both of these results are observed, it can give web owners a better time of how fast your site’s loading time is.
After viewing both of these data types for your website, you should then look to follow the recommendations that Google PageSpeed offers for your website.