What kind of appeal is represented in the advertisement for Richard Pryor's movie that states "Reviewers are raving about it"?

The statement "Reviewers are raving about it" exemplifies Join the Bandwagon Appeal, which invites the audience to support a product based on the popularity or approval it has received from others. This approach taps into the social phenomenon where individuals are inclined to align their choices with what they perceive to be popular or widely accepted.

In this context, the advertisement suggests that if many reviewers are praising the movie, then it must be worth seeing. The underlying implication is that not participating or not watching the movie could mean missing out on something that a lot of other people appreciate. This form of persuasive technique is effective because it plays on the desire for social validation and the fear of being left out, encouraging potential viewers to join others in their approval of the film.