What insights can I get from APM?

You will be able to monitor your application performance from APM. You will get the details about each of your function calls which you can use to optimize your function code. If you have accessed many of the Catalyst components and want to know where it takes more time to execute, you will be able to identify each of the Catalyst component calls in a graphical format so that it would be helpful to optimize your logic in order to improve your overall application performance.