For web-based surveys, Google Surveys reports on the inferred age and gender of respondents based on the websites users visit. Location is derived from the users’ IP addresses.
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Please note that it's possible to miscategorize users. For example, if a household uses a shared computer, we may categorize a user based on the combined interests of the household.
Certain surveys, such as local surveys, may be used to get feedback about a location you’ve recently visited and request permission for these responses to be posted publicly.
For more information about the Google privacy policy, please visit www.google.com/policies/privacy.