The first click, linear, time decay, and position-based attribution models will be discontinued.
Update regarding timing: The following attribution models, namely first click, linear, time decay, and position-based, will be discontinued.
Google has rescheduled the deprecation of non-last-click rules-based attribution models, shifting the originally anticipated date from this month to mid-July. Consequently, there has been a one-month delay in the implementation of this change.
Google Says: As a follow-up to our announcement that first click, linear, time decay, and position-based attribution models will be going away, Starting mid-July, selectability of these models for all conversions in Google Ads will be removed.
Additionally, Newly created conversions no longer offer first click, linear, time decay, or position-based attribution models. Similarly, existing conversions that are not utilizing these models will no longer be permitted to switch to them. If your account currently has conversions utilizing these attribution models, they will be able to continue using them until they are fully phased out in September.
Update from: Posted by Sheba Rasson, Product Manager, Attribution