Strictly speaking, the wrench pictured is a Crescent wrench, but the generic name I’ve always used is an adjustable wrench. I recently learned I’d been using them wrong my whole life as the arrow indicates on the handle next to the hanger hole below.
The reddit link is to a post where the names in the comments are gold. Some of my favorites are “All-Sixteenths wrench,” “Tennessee nut f**ker,” “Swedish nut lathe,” and “Adjustable hammer.”
https://www.reddit.com/r/Tools/comments/1d9rfst/_/
And the fact that someone recognized the common use case and purpose-made a the adjustable hammer (AKA “Miner’s wrench” or “thumb detecting nut f**ker.) is a real hoot. And the direction arrow (above the 6” mark) on this indicates what I was taught and have always done - minimize the lever arm on the adjustable jaw as it is the weakest. Maybe Crescent is trying to maximize their replacement market.