When patients come into the emergency room, they don't see a doctor immediately, they go to a triage nurse. The nurse knows enough about medical problems to properly assign that person to the doctor that can help them the quickest. Since the doctors are the most limited resource, triage nurses help to assign them as effectively as possible. Triage in open source means looking at open issues and adding useful information for maintainers. While you might not maintain a repository, you can help those who do by diagnosing issues, reviewing pull requests. Triage is an important part of open source. It can be difficult to keep up with bugs and assess the validity of contributions. Code introduced to fix one problem can easily generate more problems than it solves, so it's important for maintainers to look closely at bug reports and code contributions. Unfortunately as the size of a project grows, the demands placed on the maintainers grow. This means they are forced to choose between spending enormous amounts of time reviewing each GitHub issue, only skimming over issues, or worse, ignoring issues.