Make your browser tab talk
This training is about how you can show a fun (and maybe useful) effect to the visitors of your site.
If your visitor decides to leave your site to go to another page that they have opened in another tab in their browser, you can display a special message in your browser tab.
Not a critical factor in web development, but I have seen websites that does this in a beautiful and fun way.
Important: To do this, you need to know how to put code in the <head> section of your theme. I will not go into how that is done.
Next: How it looks