Mid-roll ads are advertisements placed in the middle of a YouTube video, typically for videos longer than 8 minutes. Unlike pre-roll ads (shown before the video starts) or post-roll ads (at the end), mid-roll ads interrupt the content, offering an opportunity to engage viewers while they’re deeply invested in the video. To use mid-roll ads effectively, timing is everything. Place them at natural breaks or transitions in the content, such as a pause in dialogue or between scenes, to avoid disrupting the viewer's experience. Ensure the ad length is short and the content engaging to maintain viewer attention. Additionally, ensure relevance by targeting the right audience based on their interests or viewing habits. Avoid overloading a video with too many mid-roll ads, as this can frustrate viewers. When done right, mid-roll ads can boost engagement and drive better results without compromising the user experience.