According to PLOS. org, OA is important because:
- Accelerated discovery. With open access, researchers can read and build on the findings of others without restriction.
- Public enrichment. Much scientific and medical research is paid for with public funds. Open Access allows taxpayers to see the results of their investment.
- Improved education. Open Access means that teachers and their students have access to the latest research findings throughout the world.
Source: http://www.plos.org/open-access/