Google adds cross-campaign testing with the new Mix Experiments beta, allowing advertisers to run experiments that span multiple campaigns. The feature aims to help marketers isolate and compare different strategies across campaigns rather than testing one change at a time within a single campaign.
What the new Mix Experiments beta does
Google’s Mix Experiments beta enables businesses to test combinations of campaign settings or creative approaches across multiple campaigns. Instead of typical A/B tests limited to a single campaign, marketers can now define a mix of variables to test in aggregate and see overall performance impacts. The tool is designed to measure which combination of tactics works best for broader goals.
How cross-campaign testing works
Advertisers choose the variables they want to test — such as bidding strategies, audience signals, or creative assets — and assign those to experiment groups across selected campaigns. Google then splits traffic or budget to evaluate performance differences. Results show which strategy delivers better outcomes at scale.
Benefits for advertisers
Cross-campaign testing helps marketers understand how changes affect overall performance rather than outcomes in isolated silos. It can reveal, for example, whether a particular bidding approach works better across multiple products, regions, or audience segments. The feature supports data-driven decision-making at a portfolio level.
Beta rollout and availability
Google has begun rolling out Mix Experiments in beta to eligible advertisers. The option appears in the Google Ads interface alongside other experiment tools. Advertisers who join the beta can start defining cross-campaign tests and reviewing results as part of their campaign planning and optimisation processes.
Use cases and strategy
The new capability is useful for marketers managing large portfolios or multi-product campaigns. It provides insights into how strategic changes perform across a group of campaigns rather than within a single unit. Teams can use these learnings to refine overall strategy and allocation of resources.
Conclusion
Google adds Mix Experiments beta to bring cross-campaign testing to advertisers, giving them a way to evaluate performance drivers across multiple campaigns and improve decision-making with aggregated experiment data.
Source: https://searchengineland.com/google-adds-cross-campaign-testing-with-new-mix-experiments-beta-467837
