What is the purpose of a wormhole?

Could you kindly explain to me in layman's terms, what exactly is the purpose of a wormhole? I've heard it mentioned in relation to cosmology and quantum physics, but I'm not quite sure how it fits into the grand scheme of the universe. Does it serve as a bridge between two distant points in space? Or does it have a deeper, more profound role in the interconnectedness of our universe? I'm really curious to understand its significance and the implications it might have on our understanding of the cosmos.