The Reviews System is Google’s algorithmic system for evaluating the quality of review content across a broad range of subjects including products, services, destinations, and media. It evolved from the Product Reviews Update series that launched in April 2021, and Google announced in late 2023 that the system now runs continuously rather than as periodic named updates — meaning improvements or declines in rankings for review content can occur at any time as the system re-evaluates pages. Google’s guidance emphasises that high-quality reviews should be written by someone with genuine first-hand experience, should include original evidence such as photos or test data, should evaluate multiple options where relevant, and should cite credible sources. Sites producing review content solely by summarising third-party listings, without independent assessment, are the primary targets of the system.