World of Warcraft Rotations?

I know, this is my second question about World of Warcraft. I haven't played in a really long time and I'm trying to get back into it. I know rotation is a common term for dps classes and I know it's used when raiding. But, what exactly is it? I tried checking on Google and stuff but everything I... show more I know, this is my second question about World of Warcraft.

I haven't played in a really long time and I'm trying to get back into it.

I know rotation is a common term for dps classes and I know it's used when raiding. But, what exactly is it? I tried checking on Google and stuff but everything I read was kind of confusing and complicated. Examples of rotations please?
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