How do I bake a high polygon model, to a low poly one. I have had the idea suggested to me, but I have know idea what they mean.

Thanks for your help.

You can’t bake a highpoly model to lowpoly. But you can bake normal map of high poly and you can apply that map to lowpoly.
For your reference watch this

Here’s another tutorial on the subject:

You can follow @R_KRI’s link… thats good enough…Cheers!!!