Website page speed is becoming more and more relevant to your website due to people using mobile devices e.g iPhones, tablets and even the old desktop.
Have you checked your site's pagespeed?
Read what Google has to say:
PageSpeed Insights measures the performance of a page for mobile and desktop devices. It fetches the url twice, once with a mobile user-agent, and once
with a desktop user-agent.
PageSpeed Insights checks to see if a page has applied common performance best practices and provides a score, which ranges from 0 to 100 points, and falls into one of the following three categories:
Please note that PageSpeed Insights is being continually improved, to account for new performance best practices, and the provided score will change over time. A high score is correlated with a fast user experience but does not guarantee it. Learn more.
PageSpeed Insights measures how the page can improve its performance on: