To effectively promote an upcoming product launch with multiple native video ads, the appropriate line item type to utilize in Display & Video 360 is a Display line item.
- Mobile app install
- Video
- YouTube & partners
- Display
The correct answer is: Display
Explanation: The Display line item in Display & Video 360 is versatile, accommodating a range of creative formats including image, HTML5, rich media, and notably, native ads encompassing both display and video types. This line item type enables the inclusion of standard, expandable, and native creatives, such as native site (square and rectangle) and native video creatives, offering a tailored approach to engaging target audiences through diverse ad formats.
Read more here: https://support.google.com/displayvideo/answer/2891312