Which of the following is NOT a social media channel mentioned?

The option that is not a social media channel is Yahoo. While Yahoo is a well-known web services provider that offers various internet services like email, news, and finance, it does not function primarily as a social media platform. In contrast, Facebook, Instagram, and LinkedIn are all established social media channels that foster user interaction, content sharing, and networking. Facebook allows users to create profiles and connect with friends, Instagram focuses on photo and video sharing, and LinkedIn serves as a professional networking site to connect individuals for career opportunities and professional development. This distinction highlights the nature of Yahoo's services compared to the social engagement primarily associated with the other listed platforms.