What means "ref=hexometer"?

Read this if you noticed Hexometer in your website statistics.

Hexometer is a Website Audit and Monitoring Service and for realizing that the Hexometer's Bot (also known as a web robot) reads website's pages to analyze data and provide the requested reports.

Internet service providers report that about 50-60% of all internet traffic is driven by machines, but not all bots are "showing" their names when reading pages.

Hexometer Bot shows its name and user agent, so the website owner knows when and how many times Hexometer reads any page.

For example if you will run a Page Speed Test of your website at https://hexometer.com/page-speed-scanner/ then you will notice ref=hexometer in your traffic analytics reports.