Improve the site speed of your website. Ideally, you want a page load time of under 2 seconds. For the vast majority of sites out there, this is a feasible load time that you can get at a reasonable cost. Tools:
https://blog.kissmetrics.com/speed-is-a-killer/
https://gtmetrix.com

Sources:
https://blog.markgrowth.com/how-to-improve-the-website-3-essential-parts-e5c25d947804