What is Corporate Social Responsibility (CSR)?

The term CSR refers to Sustainable Development issues applied to business. The ISO 26000 standard defines CSR as:
an organization's responsibility for the impacts of its decisions and activities on society and the environment, through transparent and ethical behavior that:
- contributes to Sustainable Development, including health and the welfare of society;
- takes into account the expectations of stakeholders;
- is in compliance with applicable law and consistent with international norms of behavior;
- and is integrated throughout the organization and implemented in its relations.

The 6 core subjects listed by ISO 26000 are:
Human rights
Labor practices
The environment
Fair operating practices
Consumer issues
Community involvement and development

Source: ISO Guidance on Social Responsibility

See also: What is EcoVadis?