This document summarizes a presentation given at the Massachusetts State House on mapping communities of opportunity in Massachusetts. It discusses how opportunity matters for life outcomes, how opportunity can be mapped, and the findings of opportunity mapping in Massachusetts. The key findings are that people of color, immigrants, and low-income individuals are disproportionately concentrated in low-opportunity neighborhoods with poor education, economic, and health outcomes. The presentation calls for adopting strategies to open access to opportunities and remedy opportunity isolation by bringing opportunities to deprived areas, connecting people to existing opportunities, and investing in people, places, and linkages.