Postroll is a term commonly used in video advertising to refer to the ads that are displayed after the main video content has finished playing. These ads are typically shown as a way to monetize the video content and generate revenue for the publisher or content creator.

Postroll ads can take various forms, including static images, interactive banners, or even full-length videos. They are strategically placed at the end of the video to capture the viewer's attention and encourage further engagement with the advertised product or service.

HTML provides the necessary tools to seamlessly integrate postroll ads into video content. By utilizing HTML5 video tags and JavaScript, developers can control the timing and display of postroll ads, ensuring a smooth and uninterrupted user experience.

In conclusion, postroll ads play a crucial role in video advertising by offering a monetization opportunity for publishers and content creators. With HTML's flexibility and functionality, implementing postroll ads becomes a seamless process, enhancing the overall user experience while generating revenue.