Help with instructions

I am at the end of a round and it says "at the end of rnd, K1, then move marker 1 st to the left. I am probably being dumb here, but I don’t exactly know how to do this? Does this mean I move my marker, K1 then move the marker to the left of the knit stitch I just did? Also I am using a marker that is a solid ring. Thanks for your help!

It says, “at the end of rnd, K1, then move marker 1 st to the left.”…Does this mean I move my marker, K1 then move the marker to the left of the knit stitch I just did?

You got it.

Another way to say this would be…
Knit to end of round, remove marker, K1, replace marker, continue.