What are wrappers used for?

I'm curious to know, could you elaborate on the purpose of wrappers? I've heard the term mentioned in the context of cryptocurrency and finance, but I'm not quite sure how they're used or what benefits they offer. Could you possibly explain in a way that's accessible to a non-expert? I'm particularly interested in understanding how wrappers might fit into a broader financial ecosystem and how they might enhance the functionality or efficiency of certain operations.