Google recently updated its Conversion Goals documentation, noting that secondary conversions can help algorithm learning.
Advertisers are encouraged to keep crucial goals like Purchase as primary objectives, while also tracking mid-funnel metrics, such as Add to Cart and Begin Checkout.
For lead generation, tracking valuable page views using Page view can also help improve outcomes with Smart Bidding.

Important considerations include ensuring only final goals are set at the account level and assigning additional conversions to the correct categories to avoid misleading data.
While Demand Gen campaigns are confirmed to benefit, it’s still uncertain for other campaign types.
This update is likely linked to the Journey Aware Bidding for Search campaigns, enhancing how conversion signals are leveraged for performance improvement.
This update was shared by Dario Zannoni.