Digital Soldering Iron - Why You Need One

What is a digital soldering iron and why do I need one? This is my first time using one and this small 100W iron is nice. I like it and don't want to go back.
Checkout the one in this video on Amazon with my paid Amazon Affiliate link (Thank you if you decide to buy something!)
amzn.to/3VFKawq Soldering Iron Kit, 100W Soldering Gun with LED Digital Display, Adjustable Temperature 356-932℉