Review Widget
A review widget is the on-page component that displays customer reviews on a product or collection page, typically showing the star rating, review count, and individual review text, and is delivered either as JavaScript that injects the content after load or as server-rendered HTML.
The widget is the visible surface of a review program, and the way it is delivered decides whether anyone besides shoppers can read it. Many widgets inject their reviews client-side: the page arrives nearly empty and a script fetches and renders the reviews afterward. A human with a modern browser sees them, but a crawler that does not execute that script, or executes it on a budget, may index a page with no review text at all.
Server-rendered review HTML is the alternative. The reviews are present in the initial document, so search engines and AI answer engines can read them without running JavaScript. This is the practical difference between reviews that merely appear and reviews that get crawled, corroborated, and cited. Getting existing reviews readable in this way is the gap BetterReviews closes.
The honest caveat is that a widget can look identical in both modes, so you cannot judge it by eye. Check the raw HTML, not the rendered page: view source or fetch the page without JavaScript and confirm the review text is actually there. A widget that is fast and pretty for shoppers can still be invisible to the systems that decide whether your store shows up.