Share more information about your inventory to drive more value
There’s a strong correlation between how much information you share about your video inventory and higher CPMs and fill rates. When video inventory contains viewability, brand safety, and demographic data, it’s more desirable to advertisers who want to reach audiences on premium content. As shared in our recent video viewability guide, increasing the viewability of your video ads from 50 percent to 90 percent, can result in more than an 80 percent revenue uplift (averaged across desktop and mobile sites) according to internal data.
If your video inventory contains signals like Device ID, App ID, Package Name, Show Name, TMSID, Description URL and Viewability signals it will likely drive the highest possible value for you and your advertising partners. When it comes to Device ID, Google Ad Manager supports the IAB’s Identifier for Advertisers (IFA) guidelines and we recommend that partners adopt these guidelines to provide better ad experiences in a privacy-focused way.
Source : The Official Google Blog