A log file is a record that keeps track of events, processes, or messages generated by a computer system or application. It serves as a detailed account of activities, such as user actions, system errors, or transactions, which can be useful for troubleshooting and monitoring performance. Log files are typically stored in plain text format, making them easy to read and analyze. These files are commonly used in various fields, including software development, network management, and cybersecurity. By examining log files, professionals can identify issues, track usage patterns, and enhance the overall security of systems like web servers or databases.