How AirFlow logs are used in the platform?

I saw in the docs a section about AirFlow logs in system.
While the section explains how to send the logs to montecarlo I don't understand what the system is actually doing with these logs. Where will they be available in the system?
Is there some limitation on the amount of logs? e.g if an AirFlow DAG generates 1GB of logs it will still be collected by MC ? Cost implications?
https://docs.getmontecarlo.com/docs/airflow-logs