The term 'Popular Streaming Service' refers to two services that are widely used for streaming media content: Hulu and iHeartRadio. Hulu is a subscription-based streaming service that offers access to thousands of TV shows, movies, and other content. iHeartRadio is an internet radio and music streaming service that provides access to over 1, 500 live radio stations and millions of songs. Both services are popular among users who want to access their favorite content on demand.