Definition: Word 'WSFTP.LOG' refers to a log file created by web server FTP service for logging server-side activities, including server configuration changes, user interactions, errors, and more. Detailed definition: a log file is a text file that logs user activity on servers and operating systems over time, usually formatted as a list of events, messages, or other data, typically stored in a database or spreadsheet. It's used to monitor and manage the server environment for troubleshooting purposes and to ensure system reliability.