Here you can find a summary of what changed in each wave of GWI Core Plus, including any key updates that could impact your analyses.
For a broader overview of the GWI Core Plus data set — including methodology, coverage, and key features — visit our Understanding GWI Core Plus article, where you can also download the questionnaire for the latest wave.
Q1 2026
Q1 2026
Updates to GWI Core for Q1 2026 include:
We're now asking Types of Foot Care Products to all respondents, giving a broader and more accurate view of foot care product usage. Previously, this question was only asked to respondents who selected Foot Care Products in the "Types of Personal Care Products Used" question.
To reflect this update, we've reintroduced this question as new. The previous version remains available in the Legacy folder, and any historical comparisons should be made with caution given the broader base.
We’ve also refreshed a number of questions to better reflect the evolving market landscape, including updates to:
Meal Kit Delivery Services
As a result of these updates, you may notice fluctuations in brand data due to the addition, removal, or refinement of brand options, improving the relevance of choices available across markets.
Click here to see this wave of GWI Core Plus on the platform.
Q3 2025
Q3 2025
Updates to GWI Core Plus Q3 2025 include:
We’ve included new brands, specifically in the nailcare and stomach pain treatment categories.
We’ve updated coverage on over 65 year olds across France, Germany, Italy, and Spain.
The addition of 65+ in these markets naturally led to some shifts in behavior compared to previous waves — for example, increases in watching traditional TV channels, listening to classic radio stations, reading printed newspapers, prefering long-life milk and dark chocolate, and reporting higher use of dental or eye care products.
If your analysis compares waves without 65+ respondents to those that include them, you may want to exclude this age group for consistency; learn more in this Help Center article.
Click here to see this wave of GWI Core Plus on the platform.
Q1 2025
Q1 2025
Additions to GWI Core Plus for Q1 2025 include:
A new question on Types of Foot Care Products
We have also split out "Smoke cigarettes or other tobacco products" into "ready-made cigarettes" and "rolling tobacco" to better reflect industry segmentation.
Click here to see this wave of GWI Core Plus on the platform.