Log checking is the process of reviewing log files to monitor application activity, troubleshoot issues, and identify security events. Logs record what happens on servers, applications, and cloud services.
With log checking, engineers can find errors, failed logins, application crashes, and performance issues using tools like Amazon CloudWatch Logs, AWS CloudTrail, and Linux log files.
In simple words, log checking helps you understand what happened in your system and quickly find the cause of problems.