Editing any account or campaign settings, such as bid strategy, bid adjustments, bids, budget, keywords, audience, demographics, and ad scheduling can change your performance.
If you’re using Smart Bidding strategies, it takes about 2 weeks for the campaign to learn and fully optimize. Any changes to your conversion action settings, selective optimization setting, or attribution model can also impact your campaign’s performance while it adapts and optimizes towards these new settings.
What you can do
Check change history for updates made to the account or campaign.
Need something else?
Check other common reasons why your campaign performance is fluctuating.
