Hi Tom, I was visiting Backlinko.com and came across this URL. https://backlinko.com/increase-website-traffic I see a bell icon on the top right of the menu bar. It displays a custom message and is different for different URLs on the blog.
Do you know how do I enable it on my GP powered site? If yes how? If no, would you be please kind enough to tell me what tool is used there to get that feature?