Before creating a release ensure you have created an app.
Navigate to "Releases" section using the left-hand navigation pane.
Click on the "Add release" button located on the top-right corner of the page.
Choose the desired app for which you wish to initiate a release.
Add a release tag used to uniquely identify this release
Add a changelog to describe the changes included in this release.
Finally click on "add release" button to save your release.
Need to know how to delete a release? Check out this article for more details.