So when google shows me the same add 1,000 times from China they're not stalking me on every video I watch? Or they are? It seems like they are or why would the

So when google shows me the same add 1,000 times from China they're not stalking me on every video I watch? Or they are? It seems like they are or why would they create so many fake low quality videos. You cannot even end up blocking them all.