How to stick the footer to the bottom of the page? [closed]

A quick search shows this question has been asked and answered many times.

From StackOverflow: Make footer stick to bottom of page correctly

From StackOverflow: How to get the footer to stick to the bottom of your web page.

From CSS-Tricks: 5 different ways to make a sticky footer

From Code Pen: “Always on the bottom” Footer

From WordPress: How to make footer fixed to the bottom of the screen?

I used the WordPress answer for my answer:

.site-footer{
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;   
}