Which of the following is NOT a content delivery channel?

Television ads are considered a form of paid media used for broader advertising campaigns rather than a direct content delivery channel in the same sense as the other options. In digital marketing context, content delivery channels are typically platforms where content is shared directly with the audience, allowing engagement and interaction.

Search marketing, email, and a company blog actively deliver content to targeted audiences and facilitate interactions, making them effective channels in content marketing strategies. These platforms allow for tracking engagement metrics, viewer interactions, and feedback on content. Television ads, on the other hand, rely more on traditional broadcasting methods and do not provide the same level of direct engagement with the audience or control over content distribution compared to the digital channels mentioned.