Malware, short for malicious software, refers to any software intentionally designed to cause damage to a computer, server, or network. It encompasses various types of harmful programs, including viruses, worms, and trojans, which can disrupt operations, steal sensitive information, or gain unauthorized access to systems. The impact of malware can be severe, leading to data breaches, financial loss, and compromised privacy. Users can protect themselves by employing antivirus software, keeping their systems updated, and practicing safe browsing habits to minimize the risk of infection.