Abstract: A system and method to provide a sentiment measurement system with automatic ad placement to collect surveys of voters is described. This enables a candidate to rapidly and easily measure voter sentiment at scale, quickly and cost-effectively while addressing technical limitations that normally prevent accurate use of traditional internet ad platforms for such purposes. Existing ad targeting is not designed for providing representative samples, thus the system can automatically target ads and regularly adjust based on incoming poll responses to ensure representative data is received. The system and method applies to other sentiment measurement, e.g. general opinion polling. Further, the system and method combines online micro-targeting with dynamic bias correction to produce appropriate sample groups.