Each optimization card has a View history link that opens the full timeline of decisions. The table shows date and time, campaign, action (Scaled, Reduced, Ramp, Adjusted, Duplicated, Paused, or Alert), the budget before and after, and the spend, results, CPA, and ROAS at that moment. Below each row, the reason appears as colored labels for quick reading, such as TOP Sales, KILL no conversion, Weekly Cap, or Bad Today, followed by the full explanation. You can filter by type (All, Scaled, Reduced, Alerts, Adjustments), search by campaign name or reason, and filter by date. Click Show more to load older records.