https://docs.magento.com/m2/ce/user_guide/cms/widgets.html

Widgets

A widget is a snippet of code that makes it possible to display a wide range of content and place it at specific block references in your store. Many display real-time, dynamic data and create opportunities for your customers to interact with your store. The Widget tool makes it easy to place existing content such as blocks with images and text, and interactive elements most anywhere in your store.

You can use widgets to create landing pages for marketing campaigns, display promotional content at specific locations throughout the store. Widgets can also be used to add interactive elements and action blocks for external review systems, video chats, voting, and subscription forms, or to provide navigation elements for tag clouds and image sliders.

New Product List Widget