This document discusses open access and how it benefits various groups. It defines open access as free and immediate access to scholarly works online without payment barriers. Open access increases the visibility, usage, and impact of research. It also benefits students and educational institutions by providing access to crucial materials regardless of budget. Businesses can also benefit from open access stimulating innovation. The public benefits from access to research relating to issues like health, energy and the environment. The document provides examples of open access increasing downloads and discussions of articles. It suggests ways libraries can support open access including raising awareness of open resources.