First job help

Hello, I am a new registered nurse applying for my first job. When it says rotate shifts but it says the schedules hours are 7p-7a what does this mean? I am able to work the night shift forsure which is great because within the jobs description it says the schedules hour is 7p-7a. Yet under the shifts category it says “rotate all shifts”..... Does this mean I’ll be working different days and times? Or does it mean I’ll be working 7p-7a shift no matter what BUT on different days. Help 😭