The main purpose of the OPIOIDS Act is to enhance the collection and accuracy of data related to opioid-related overdoses in the United States. This legislation aims to provide the Attorney General with the authority to grant funds to various state and local entities to improve their data systems and surveillance efforts concerning opioid overdoses. Key provisions of the Act include the ability for the Attorney General to award grants to states, territories, and localities specifically for improving data collection on opioid overdoses.