One widget, different reviews per page
The short answer
Dynamic Sources lets one widget display different reviews depending on the page it is on. A multi-location business builds the widget once and each location page shows its own reviews.
It is an Enterprise feature and is set up with support rather than switched on in the editor.
What problem it solves
A chain with forty locations otherwise needs forty widgets, styled identically and maintained separately. Change the design and you change it forty times. Dynamic Sources makes it one widget whose content varies by page.
Who it is for
Multi-location businesses, franchises, agencies managing many client locations under one account, and marketplaces with per-vendor pages. If you have one location it is not relevant.
Getting it set up
Contact support. Source limits may differ when Dynamic Sources is in use, and the configuration depends on how your pages identify which location they are.