Corporate social responsibility (CSR, also called corporate conscience, corporate citizenship, social performance, or sustainable responsible business/ Responsible Business)[1] is a form of corporate self-regulation integrated into a business model.
CSR policy functions as a built-in, self-regulating mechanism whereby a business monitors and ensures its active compliance with the spirit of the law, ethical standards, and international norms. In some models, a firm’s implementation of CSR goes beyond compliance and engages in “actions that appear to further some social good, beyond the interests of the firm and that which is required by law.”[2][3] CSR is a process with the aim to embrace responsibility for the company’s actions and encourage a positive impact through its activities on the environment, consumers, employees, communities, stakeholders and all other members of the public sphere who may also be considered as stakeholders.

Source: http://en.wikipedia.org/wiki/Corporate_social_responsibility