[Recommendation](http://schema.org/Recommendation) is a type of [Review](http://schema.org/Review) that suggests or proposes something as the best option or best course of action. Recommendations may be for products or services, or other concrete things, as in the case of a ranked list or product guide. A [Guide](http://schema.org/Guide) may list multiple recommendations for different categories. For example, in a [Guide](http://schema.org/Guide) about which TVs to buy, the author may have several [Recommendation](http://schema.org/Recommendation)s.