Creating a good user experience for website visitors is not a piece of cake. There is no single proven formula for a good UX.
However, you must pay close attention at regular intervals to specific metrics at regular intervals.
These insights can help you identify issues that you need to work on for improving site speed.
TCP (TRANSMISSION CONTROL PROTOCOL) CONNECTION TIME
You can use tools like Google PageSpeed Insights and GTMetrix to analyze to performance of your site.