Is MATIC now Polygon?

So, let me get this straight. Is it true that MATIC is now Polygon? I mean, I've heard about both of them in the crypto space, but I'm a bit confused about their relationship. Is Polygon just a rebranding of MATIC, or are they two separate entities with different functions and purposes? Can you help clarify this for me? Also, if they are indeed the same, what led to the name change? Was it a strategic move to better position the project in the market, or was there some other reason behind it?