What is the name of this slider or widget?

Hello,

To create a slider like this demo, use the Woodmart built-in in slider to create it like this:

Please read the documentation for more details https://xtemos.com/docs/woodmart/woodmart-slider/

To create banners like this, please use the WoodMart Promo Banner widget.
https://postimg.cc/5HtWVvgM

Also, you can use the theme template library and import the relevant templates you want, and use it on your site. https://xtemos.com/docs-topic/templates-library/

Best Regards