The length of a Facebook video ad typically depends on the nature of the campaign and the goals it wishes to achieve. In general, Facebook suggests that video ads be kept between 15 seconds to 1 minute in length. This is based on researches carried out by Facebook which shows that engagement remains high within this time frame. Moreover, videos that are shorter than 15 seconds lead to low completion rates and videos that are longer than 1 minute tend to have a greater chance of losing the audience鈥檚 attention. That being said, some exceptions exist. For example, if the intent of the ad is to increase brand awareness or generate interest, short videos of fewer than 15 seconds could be effective. If the ad is being used for storytelling, it is a good idea to make it longer, keeping the story clear and concise; anywhere from 30 seconds to 1 minute and 30 seconds is the recommended time range. Additionally, if the ad is meant for a specific target audience, longer videos might work better than shorter ones because the audience is already likely to be invested in the content. In conclusion, While there is no one-size-fits-all approach to determining the ideal length for a Facebook video ad, it is generally accepted that ads of 15 seconds to 1-minute duration are optimal, keeping in mind the audience, goals and overall objective of the ad.