Newly created Demand Gen campaigns in Google Ads will now have view-through conversion (VTC) optimization enabled by default. Previously, VTC optimization was disabled by default and limited to YouTube and Discover Feed. Now, it supports Display inventory as well.
This update means advertisers launching new Demand Gen campaigns inherit this optimizer setting without having to manually toggle it on, affecting how campaigns might initially perform. Notably, VTC conversions remain partially biddable and do not appear in the main conversions column.

VTC optimization still applies only to video assets across YouTube, Display, and Discover Feed. It remains in an open beta phase, available to all interested advertisers.
Read the official help page here: About view-through conversion optimized bidding for Demand Gen campaigns.
This update was spotted by Hana Kobzová.