Out-stream advertising is a type of digital advertising that is delivered outside of a traditional video player or content stream. Out-stream ads are typically served in the form of display ads, native ads, or interstitial ads, and are designed to be viewable and engaging on a variety of devices and platforms. Out-stream advertising is often used in the context of mobile advertising, where ads are delivered to users on the go, and where the availability of video players or content streams is limited. Out-stream advertising can be effective for advertisers who want to reach users on mobile devices, and who want to deliver value and relevance to their target audience. Out-stream advertising can also be beneficial for publishers and platforms, as it can provide a new source of revenue and a more engaging user experience for their audience.