As a follow-up to our announcement that first click, linear, time decay, and position-based attribution models will be going away, we will be removing selectability of these models for all conversions in Google Ads beginning in mid-July. This means that newly created conversions will no longer have first click, linear, time decay, or position-based as an attribution model option. Existing conversions not using these models will also no longer be able to switch to these models. If your account has conversions using these attribution models, these conversions can continue to use them until they’re removed completely in September.
Posted by Sheba Rasson, Product Manager, Attribution