Rather than assigning predefined shares, DDA uses patterns in the available data. Results depend on observable signals, eligible channels, attribution windows, and the product’s modeling approach.
The claim that GA4 automatically switches DDA to a position-based model below a conversion threshold is incorrect. Do not mix GA4 and Google Ads requirements or apply historical data thresholds as universal current rules; consult the relevant product documentation.
Do not label unimportant clicks as equivalent to purchases merely to increase data volume. Keep business-action definitions consistent, investigate missing measurement, and compare models to understand how interpretation changes.