When you are sure the closed staging repository has no problem, click the Release button. You will be asked to input a description for this release. Staging rules will run again. If the closed staging repository is released successfully, you will get a notification email. Now your artifacts are in the Releases repository, which is synced to The Central Repository roughly every 2 hours. Now you can browse or search your artifacts from Nexus UI.
Once your artifacts are released, they will be synced to The Central Repository and you will not be allowed to update or delete them.