A question arises: will the creator know I have unsubscribed from them? Yes, the creator will notice that someone has unsubscribed to them as their subscriber count will decrease.
They may also notice who unsubscribed them, but this mainly happens if the creator has a small account. They will know that you have unsubscribed them if they see who viewed their story, and after unsubscribing, they will see that your name no longer appears in the story views.
Now let us move ahead. I hope everything in this article (which is about what subscribed means on Snapchat?) is clear until now. But in most cases, creators do not see who has viewed their story, so they would not know who has unsubscribed.