How do I view applications for an opportunity and change its status?

View applications. See applications. Change application status.

You can view the applications for an opportunity in the opportunity overview on your organisation page (organisation page > opportunity tab). Press on the "+" button on the left-side of the opportunity or on the counter beneath the "applications" tab.
After this, you can also edit the status of an application, send a message to a volunteer, or make a note about the application. These notes will only be visible to voluntary moderators and admins of your organisation.