Microsoft SQL Server Profiler is a graphical user interface to SQL Trace for monitoring an instance of the Database Engine or Analysis Services. You can capture and save data about each event to a file or table to analyze later. For example, you can monitor a production environment to see which stored procedures are affecting performance by executing too slowly. SQL Server Profiler is used for activities such as:Stepping through problem queries to find the cause of the problem.Finding and diagnosing slow-running queries.Capturing the series of Transact-SQL statements that lead to a problem. The saved trace can then be used to replicate the problem on a test server where the problem can be diagnosed.Monitoring the performance of SQL Server to tune workloads. For information about tuning the physical database design for database workloads, see Database Engine Tuning Advisor.Correlating performance counters to diagnose problems.SQL Server Profiler also supports auditing the actions performed on instances of SQL Server. Audits record security-related actions for later review by a security administrator.

SQL Profiler utility allows us to basically track connections to the SQL Server and also determine activities such as which SQL Scripts are running, failed jobs etc..