Hi again.
Yes, it could be useful application, especially when you want to "catch" a SQL query that is attacking your database. Basically, it creates a "trace" of all the communication to a specific database.
It is an application that you have to install separately then your SQL Server, not sure if it is installed automatically. More info: https://docs.microsoft.com/en-us/sql/tools/sql-server-profiler/sql-server-profiler