Final answer:
Epinions, Yelp, and TripAdvisor are popular opinion and review sites launched to allow individuals to share their experiences and opinions.
Explanation:
Epinions was launched by Ramanath Guha in 1999, providing access to personal opinions on products and services through crowdsourcing the review process. Similarly, sites such as Yelp and TripAdvisor aimed to democratize reviews and offer a platform for individuals to share their experiences and opinions.
Learn more about Review and opinion sites here:
https://brainly.com/question/46432012
