In this article, we’ll outline different reasons for Search campaign fluctuations and changes, why they may lead to changes in campaign performance over time, and how you can use the tools in your Google Ads account to understand what’s driving these changes.
Keep in mind: It’s normal for your campaign performance to vary.
On this page
- Use diagnosis tool to identify serving issues
- Assess performance based on your bid strategy and optimization goal
- 10 common reasons why your performance is fluctuating
Before you begin
Use Explanations to identify reasons for performance changes in a single click
Explanations are available for Search campaigns using manual CPC, enhanced CPC, enhanced CPC for value, target CPA, maximize conversions, maximize clicks bidding, maximize conversion value, and target ROAS. Explanations give you insights into large changes in your account’s performance and help you quickly find out why they happened. By default, you’ll find explanations that compare the date range you selected with the previous period of the same length.
- Go to your campaign or ad groups page.
- Hover over values in your data table that are colored in blue with a dotted line.
- You’ll find how this value has changed since the last period.
- Click View explanation to find out what caused the change.
Use the Google Ads diagnosis tool to identify serving issues
If the ads in your campaign aren't appearing, use the "Ad preview and diagnosis" tool to identify the reasons. You should also confirm that the campaign hasn't reached its scheduled end date, as that would stop all ads from serving.
Go to Ad Preview and diagnosis
Assess performance based on your bid strategy and optimization goal
Before making conclusions about your campaign performance, it’s important to first consider whether the settings you are using match the metrics your campaign is optimizing towards. Update your campaign’s bid strategy or optimization goal settings to align with your business and advertising goals to ensure that you are focused on the relevant metrics when analyzing campaign performance to understand what drove fluctuations.
For example, Target CPA helps you get as many conversions as possible at or below the target cost-per-action (CPA) you set. In campaigns using Target CPA, cost-per-conversion and other conversion-related metrics may be better indicators of performance than cost-per-click and impressions.
10 common reasons why your performance is fluctuating
1. Recent changes to account or campaign settings
When you edit any account or campaign settings, such as bid strategy, bid adjustments, bids, budget, keywords, audiences, demographics, and ad scheduling can change your performance.
Learn more about Search campaign performance fluctuations: Changes to account or campaign settings.
2. Conversion tracking setup and conversion delay
When you use conversion-based bidding, such as Smart Bidding or automated bidding, sudden drops or increase in conversions or conversion value may result in performance fluctuations as Google Ads optimizes towards your set conversion action.
Learn more about Search campaign performance fluctuations: Conversion tracking setup and conversion delay.
3. Bids and bid targets
Your performance may fluctuate if you set your bids, bid limits, or bid targets without taking into consideration the historical data Google Ads will use to serve your ads.
Learn more about Search campaign performance fluctuations: Bids and bid targets.
4. Budget settings
Your campaign may be more likely to have performance fluctuations when its budget is limited.
Learn more about Search campaign performance fluctuations: Budget settings.
5. Ad quality
Ad quality is an estimate of the experience that users have when they view your Search ads.
Learn more about Search campaign performance fluctuations: Ad quality.
6. Targeting settings and overlaps
If your campaign targets a small group of users with very a specific audience, keyword, location or language settings, it may also be more likely to have performance fluctuations. You may have multiple campaigns or ad groups in your account that are eligible to enter overlapping auctions due to similar keywords or other targeting considerations.
Learn more about Search campaign performance fluctuations: Targeting.
7. Policy and ad review status
Changes to the review status of your ads or keywords can affect your performance.
Learn more about Search campaign performance fluctuations: Policy and review status.
8. Other account issues
Issues with your payments, billing transfers, or other account level issues can affect the performance of your account and the performance of your campaigns.
Learn more about Search campaign performance fluctuations: Account issues.
9. Auction dynamics
The choices made by other advertisers in the same auctions as you can affect your campaign’s performance.
Learn more about Search campaign performance fluctuations: Auction dynamics.
10. Lost impression share
Impression share data, specifically Lost Search IS (ad rank), can help you identify the percentage of time that your ads weren't shown on the Search Network due to Ad Rank in the auction.
Learn more about Search campaign performance fluctuations: Lost impression share.
