A rotating schedule for our store would be possibly a four week schedule - such as a weekend opening, the next weekend off, the next weekend closing, the next weekend off. The weekday shifts may stay the same.
But it could be different. During the interview-if the exact schedules matter to you, make it clear that you would like an explanation of the expectations. Don't let them give you vague examples. It saves a whole bunch of regret.
Many teams have pretty much predictable schedules - that could be the meaning. Personally I don't usually post an opening with that description, since there is such a wide discrepancy of possibilities. I usually use the Days/Nights/Weekends.
I hope this answered the question.