Final answer:
Non-skippable In-stream ads offer increased engagement and guaranteed visibility as they force the viewer to watch the entire ad, creating a high potential for the audience to consume the ad's content and remember the brand's message.
Step-by-step explanation:
The two key benefits of Non-skippable In-stream ads are increased engagement and guaranteed visibility. Firstly, these ads are designed to be 15-20 seconds long, which can be beneficial for advertisers because they compel viewers to watch the entire message, thereby increasing the chance of engagement. Secondly, because viewers cannot skip these ads, it ensures that the advertising content is seen, improving brand awareness and message recall. These attributes make Non-skippable In-stream ads a valuable tool for advertisers aiming to capture and retain the attention of their target audience.