Because it captures Queries in your current environment. You will be able to run the exact queries that your application launches against another environment before being migrated. In this way, thanks to the information captured and its reports. You will be able to check if the executed queries are getting better or worse. And in case of error, see the reason for the error.
In this way it is possible to upgrade your Oracle environment with greater guarantees.
In addition, it will be able to serve your DBAs on a day-to-day basis. This is because it captures executed queries along with their execution plan and other performance metrics. By comparing execution plans, database administrators will have more clues as to why a particular query has improved or worsened and can take appropriate action.