This is a "pre-release" job. It must be run manually, with a few parameters entered. It copies the "staging" area to the "releases" area and allows mirroring to begin to take place.
At some later time, after mirroring has taken place, and at the designated time, the job simrel.releng.makeVisible is the job that actually makes the new repository visible to p2 clients. That "makeVisible" job requires some configuration in advance to specify the composite files to make visible and to specify the exact time it should run.