Website Notification

Hello, I would like to know how to go about creating desktop notifications from my website to the users desktop home screen. I noticed amazon and facebook notifications would pop out in the bottom right-hand corner of my laptops home screen if an activity took place.

How would I go about creating that sort of trigger so if I post a new article on my blog it pops out on the side to notify registered users. Am not sure if am asking this in the right place but someone here always knows a direction to go so am counting on you guys for help.