This research report brings together findings from five sources to inform the consideration of legalizing iGaming in Massachusetts. This research has illustrated the complexity of such a decision. It is clear that legalization of a new gambling activity will likely lead to increased participation, and with that, harms, which are disproportionately experienced by young people and other socio-economically disadvantaged populations. On the other hand, a regulated market does provide opportunities to address public health issues which are likely already occurring, such as underage gambling, unprotected gambling, and unregulated advertising.