To make the best use of your Rankings data and in appropriate ways, it is important to understand how the measures you are interested in are created and where the information comes from. Measures created from modeled estimates, such as BRFSS measures of adult smoking, can have specific drawbacks with regard to their usefulness in tracking progress in communities. Modeled data like these are not particularly good at generating estimates that incorporate the effects of local conditions such as health promotion policies or unique population characteristics. Counties trying to measure the effects of programs and policies should take caution when using modeled estimates and look to other data sources, particularly local community information, that can help to understand the effects of interventions or changes over time. To explore how you can use individual measures to track progress in your community, visit the “Learn More About this Measure” link on each measure page in your county snapshot.