What is the difference between Malware and Worm?

Malware (Malicious Software) is a file or code, typically delivered over a network, that infects, explores, steals or conducts virtually any behavior an attacker wants. It includes various forms of malicious software, such as viruses, spyware, trojans and worms.

Worms are a type of malware that are self-replicating viruses that exploit security vulnerabilities to automatically spread themselves across computers and networks.