TrueView campaigns can help advertisers optimize for:
- A) conversions
- B) views and engagements
- C) clicks
- D) impressions
TrueView video ads are an exciting way to reach and engage your audience on YouTube and across the web. You can create and manage your TrueView campaigns in AdWords, using the “Video” campaign type. With TrueView ads, you don’t pay for random impressions or maybe-they-saw-its. You’re only charged when viewers watch or interact with elements of your video. There are two types of TrueView ads: in-stream and video discovery.
Adding interactive elements can create opportunities for viewers to engage with your brand on a deeper level, beyond watching and enjoying your video ad. Making your video ads interactive can also help you tailor your ads to better achieve specific advertising goals, such as driving app installs, product purchases, or visits to your website.
Read more here: https://support.google.com/adwords/answer/150471