The Schnorr signature is a digital signature scheme that provides a way to verify the authenticity of messages or transactions. It is known for its simplicity and efficiency, allowing for smaller signature sizes compared to other methods. This makes it particularly useful in blockchain technology, where space and speed are crucial. One of the key features of Schnorr signatures is their ability to support signature aggregation, which means multiple signatures can be combined into a single signature. This reduces the amount of data that needs to be processed and stored, enhancing the overall performance of systems like Bitcoin and other cryptocurrencies.