Complex sentence: Shazam is an American app for Macs, PCs, and smartphones, best known for its music identification capabilities that has expanded to integrations with cinema, advertising, TV and retail environments.
Split into simpler sentences: Shazam is an American app for smartphones, PCs and Macs, which is best known for its music identification capabilities. The company is best known for its music identification technology, but has expanded to integrations with cinema, advertising, TV and retail environments.