Content rating in the context of Comic books

A review is an evaluation of a publication, product, service, or company or a critical take on current affairs in literature, politics or culture. In addition to a critical evaluation, the review's author may assign the work a rating to indicate its relative merit.

Reviews can apply to a movie, video game, musical composition, book; a piece of hardware like a car, home appliance, or computer; or software such as business software, sales software; or an event or performance, such as a live music concert, play, musical theater show, dance show or art exhibition. Online review platforms also aim to provide a space where buyers can share authentic experiences—positive or negative—and businesses can use this feedback to improve their services. In the cultural sphere, The New York Review of Books, for instance, is a collection of essays on literature, culture, and current affairs.

The Entertainment Software Rating Board (ESRB) is a self-regulatory organization that assigns age and content ratings to consumer video games in Canada, the United States, and Mexico. The ESRB was established in 1994 by the Entertainment Software Association (ESA), formerly the Interactive Digital Software Association (IDSA), in response to criticism of controversial video games with excessively violent or sexual content, particularly after the 1993 congressional hearings following the releases of Mortal Kombat and Night Trap for home consoles and Doom for home computers. The industry, pressured with potential government oversight of video game ratings from these hearings, established both the IDSA and the ESRB within it to create a voluntary rating system based on the Motion Picture Association film rating system with additional considerations for video game interactivity.

The board assigns ratings to games based on their content, using judgment similar to the motion picture rating systems used in many countries, using a combination of six age-based levels intended to aid consumers in determining a game's content and suitability, along with a system of "content descriptors" which detail specific types of content present in a particular game. More recently, the ratings also include descriptors for games with online interactivity or in-game monetization. The ratings are determined by a combination of material provided by the game's publisher in both questionnaires and video footage of the game, and a review of this material by a panel of reviewers who assign it a rating. The ratings are designed towards parents so they can make informed decisions about purchasing games for their children. Once a game is rated, the ESRB maintains a code of ethics for the advertising and promotion of video games—ensuring that marketing materials for games are targeted to appropriate audiences.

A motion picture content rating system classifies films based on their suitability for audiences due to their treatment of issues such as sex, violence, substance abuse, profanity, or other matters typically deemed unsuitable for children or adolescents. Most countries have some form of rating system that issues determinations variously known as certifications, classifications, certificates, or ratings. Age recommendations, of either an advisory or restrictive capacity, are often applied in lieu of censorship; in some jurisdictions movie theaters may have a legal obligation to enforce restrictive ratings.

In some countries such as Australia, Canada, and Singapore, an official government body decides on ratings; in other countries such as Denmark, Japan, and the United States, it is done by industry committees with little if any official government status. In most countries, however, films that are considered morally offensive have been censored, restricted, or banned. Even if the film rating system has no legal consequences, and a film has not explicitly been restricted or banned, there are usually laws forbidding certain films, or forbidding minors to view them. The influence of specific factors in deciding a rating varies from country to country.