Adding Google Analytics to a Static Website

A CMS software like WordPress is awesome because it lets you get statistics in real-time, like page visits, link hits, and many more; in my case, I was unsure what I need to do with a static website and add analytics to it. So I decided to look for ideas quickly. I use Google Analytics in other business websites that I have set up, but those run on Squarespace or WordPress, in this case, my website is hosted in S3, so I was curious