With accelerated measurement, your YouTube Brand Lift study collects survey responses as fast as possible and completes when there are enough survey responses detected for conclusive lift results. You can also re-measure insertion orders at a later date (after your Brand Lift study ends) and see if there’s any improvements to performance over time.
Understanding the Measurement eligibility calculator for accelerated Brand Lift studies
When you create a Brand Lift study, the measurement eligibility calculator examines if your study meets the minimum budget requirement and if it's eligible for Brand Lift measurement.
The measurement eligibility calculator lets you know if your Brand Lift study meets the minimum budget requirements and alerts you of changes that you may need to make to your insertion orders to meet the requirements.
Survey response collection
Measurement eligibility
Brand Lift study results
While Brand Lift studies receive results as quickly as possible, volume determines how fast we are able to gather results. We allow up to 10 days for budget eligibility to be met to give more flexibility with budget distribution and spend goals. Your Brand Lift study may continue collecting results for a short period (usually less than 14 days) due to the gap between when an impression is served and when the survey is shown to a user.
Criteria
Releasing results is based on the criteria mentioned in the “Measurement eligibility” section above. If you have higher lift (above 2%), we require less survey responses to report your results. If you have lower lift (less than 2%), we require more survey responses.
The response volume is reported in near real time. We look at the detectable lift and the number of responses you may have to determine if we can provide you with results in Display & Video 360. While your Brand Lift study is running, you’ll be able to see the progress based on the following:
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Progress |
What you see in Display & Video 360 |
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Less than 50% |
“Not enough data” |
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Between 50% - 100% |
If there’s statistically significant, positive lift, we’ll report it. If not, we’ll report “Not enough data”. |
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100% |
If there’s statistically significant, positive lift, we’ll report it. If not, we’ll report “No lift detected”. |
Using re-measurement
Re-measurement is available for studies only containing YouTube line items. Re-measurement will not be available if a non-YouTube insertion order has ever been added to the study.
After your accelerated Brand Lift study ends, you can add a new study flight to re-measure. Re-measurement is the ability to collect survey responses on-demand to see lift performance over time for accelerated Brand Lift studies. We recommend using re-measurement when it matters most to your study, such as when you add new creatives to an insertion order or when you want to highlight a key moment.
Example: To measure consideration lift for an upcoming summer blockbuster, a movie studio launches an accelerated Brand Lift study 8 weeks before the film’s opening weekend. After the Brand Lift study ends, they add a new 30-second clip to their existing insertion orders, then re-measure consideration lift for the movie.
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Start in your advertiser, then click Experiments in the left menu.
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Select the Lift tab.
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Click Add flight for the study that you want to re-measure. Your existing study should be complete (meaning, there’s no additional measurement occurring).
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If you haven’t set up a study yet, follow these steps to set up Brand Lift measurement.
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If needed, make additional changes to your survey questions.
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Click Re-measure flight. This will start another Brand Lift study for re-measurement. After you start your Brand Lift study, you can view the status in the Brand Lift studies table.