The benefits have been listed as follows: they –
- lower the costs of educational materials for students
- foster pedagogical innovation and relevance that avoids ‘teaching from the textbook’
- give educators tools to gain control over learning content and delivery
- enable educators to share and remix learning materials for customized and localized use
- can foster fast feedback loops on quality and relevance of learning materials, which leads to continual improvement and rapid development
If you would like a more detailed overview, review this excellent webpage from Penn State University: https://oer.psu.edu/benefits-of-using-oer/)