Setting People in Alberta are more likely to seek information about cancer prevention online than they are to have this conversation with their primary care provider. As people turn to the internet to support health decision-making, it is critical that we improve the supportiveness of the virtual health setting for cancer prevention. Intervention In 2014, the Alberta Cancer Prevention Legacy Fund launched an online HPV Decision Aid Tool to support evidence-informed decision-making in response to suboptimal uptake of the HPV (human papillomavirus) vaccine. Google Analytics data from approximately 2000 recent interactions with this tool have yielded insights into the concerns that impact people's decision-making about the vaccine. Outcomes Most users of this tool are adults interested in the vaccine for themselves (69%), rather than parents considering immunizing their children (31%). No differences were found in the information-seeking behaviour of parents of girls compared with parents of boys, suggesting that mental models among those who are considering the HPV vaccine may have shifted in recent years. Concerns differed by respondent; cost was the most important concern among adults (62.0%), while parents were most concerned about vaccine safety (61.5%). Only 23% of users asked "what is HPV", suggesting that many people in Alberta now have basic knowledge about the virus. Implications Results provide a real-time "pulse" on knowledge and attitudes towards HPV immunization, which informs our approach to tailoring messaging with the aim of increasing vaccine uptake in Alberta. Outcomes will provide evidence needed to inform new interventions aimed at increasing HPV immunization rates.