The one thing to know about Elementor
Containers with a fixed height will clip the widget. Set the container to auto height and it behaves. Beyond that, the widget drops into columns, tabs and popups like any other element.
Where reviews belong in a Elementor site
Anywhere you can drop an element, including inside columns, tabs and popups. Inline badge layouts fit a narrow column where a carousel will not.
Full-width sections suit carousel and grid layouts; sidebars and narrow columns suit a badge. Floating badges can be restricted to particular pages and to desktop or mobile.
Reviews and search results
The widget outputs review schema markup automatically. Whether Google shows a star rating depends on what the reviews are attached to — worth reading before you expect stars, because for a business reviewing itself the answer is usually no.
What does help either way: reviews on the page are content, and a page that answers what customers actually say is a page people stay on.