SPC is a system that allows companies and organizations to manage their social participation and environmental impact by providing them with information about the clients and communities they want to work with, as well as with an assessment of their impact. This is done through a database that is accessed by the companies, which allows them to check the clients and communities they want to work with, and also allows them to check the impact of their actions. The companies are then able to make changes to their policies and practices, based on the information they have about the clients and communities.