Google Ads Budget Optimisation Update: What Agencies and Advertisers Need to Know
Google has recently announced an important update that will affect how budget-limited campaigns are optimised.
Google Ads is constantly changing, and keeping up with the latest updates is essential for businesses that want to get the best results from their pay-per-click (PPC) campaigns. Google has recently announced an important update that will affect how budget-limited campaigns are optimised. While the changes are happening behind the scenes, they could have a noticeable impact on campaign performance, reporting, and bidding strategies. Here’s what agencies and advertisers need to know.
What is Changing With the Google Ads Update?
From 17 August, Google will introduce new backend bidding target optimisation updates for campaigns that are limited by budget. The main aim of this update is to help these campaigns achieve more predictable performance while still working towards their target Cost Per Acquisition (CPA) and Return on Ad Spend (ROAS). In simple terms, Google wants campaigns with smaller or restricted budgets to perform more consistently, especially when advertisers decide to increase their spending.
Why This Update Matters
Many advertisers have experienced a common issue when increasing their campaign budget. For example, imagine an online clothing store running a Google Ads campaign with a daily budget of £50 and a target CPA of £20. If the business suddenly increases the budget to £100, the campaign may go through a period of unstable performance while Google’s Smart Bidding learns how to spend the additional budget effectively. During this time, the cost per conversion can rise, and results may become unpredictable.
Google’s latest update is designed to reduce this type of volatility. Instead of large fluctuations after a budget increase, campaigns should gradually adjust while continuing to optimise towards the chosen CPA or ROAS target. This should provide advertisers with greater confidence when scaling successful campaigns without worrying about major short-term performance changes.
Expect a Short Calibration Period
However, Google has confirmed that there will still be a short calibration period after the update goes live. During this learning phase, some advertisers may notice small performance fluctuations as Google’s bidding systems adapt to the new optimisation model. Google has not shared exactly how long this calibration period will last, but it is expected to be temporary.
New Google Ads Notifications
Another important part of this update is the notifications Google will display inside Google Ads accounts. These notifications will provide advertisers with historical campaign performance data and recommendations related to the upcoming optimisation changes. This gives businesses and agencies time to review their campaigns before the update takes effect.
For example, if an agency manages PPC campaigns for several local businesses, the notifications may highlight campaigns where the current CPA target is unrealistic based on previous performance. The agency can then review those campaigns and adjust bidding targets before the new optimisation begins. Taking action early may help reduce disruption once the update is fully rolled out.
Review Your CPA and ROAS Targets
Google has also advised advertisers to review their CPA and ROAS targets before the changes are introduced. Businesses sometimes set very aggressive bidding targets that no longer reflect current market conditions or customer behaviour. If these targets are too restrictive, Google’s automated bidding may struggle to deliver consistent results. Reviewing and updating these goals ensures campaigns remain aligned with actual business objectives.
Seasonal Advertisers Could Benefit Most
This update is particularly important for businesses that regularly increase budgets during busy periods such as Black Friday, Christmas, or seasonal sales. In the past, these budget increases often caused temporary instability while Smart Bidding adjusted. Google’s new optimisation aims to make these transitions much smoother, helping businesses maintain steady performance during peak trading periods.
Best Practices After 17 August
Although the update focuses mainly on backend bidding, agencies should still monitor campaign performance closely after 17 August. Key metrics such as conversions, CPA, ROAS, impression share, and click-through rate should be reviewed regularly to identify any unexpected changes. It is also worth avoiding major campaign edits during the calibration period unless absolutely necessary. It’s also worth checking any change it may have on your GVA campaigns.
Final Takeaways
Overall, Google’s latest PPC update is another step towards making automated bidding more reliable for budget-limited campaigns. While advertisers may experience a short adjustment period, the long-term goal is to deliver more stable performance when budgets change.
For agencies and businesses alike, reviewing bidding targets, monitoring performance, and staying informed about Google’s latest developments will be the best way to make the most of this update and continue achieving strong advertising results.