Schnorr signatures is a big deal for Bitcoin because it may solve some major problem that it has, that until now there is no effective solution that gets implemented. First, the scalability, today every transactions we do have its own signatures that makes every transaction size bigger but when we use schnorr signature, lets say that there are 5 sender and 1 receiver those transactions will only have 1 signature that can help reduce the transaction size and more transactions can fit and be confirmed in every block. Lastly it can help to stop those people to spam transactions in Bitcoin network that can also help reduce transaction fees. Hopefully it will get implemented sooner.