First, you need to log in to your Plesk control panel. Refer below link

https://www.srilankahosting.lk/knowledgebase/getting-started-with-plesk/

The parameters located in the “Logs & Statistics tab” of the “Service Plans > select a plan” section define how statistics and logs of a subscription should be stored.

Note: These settings within subscriptions are not synchronized with the settings in service plans.

Retain web and traffic statistics

It sets a period, measured in months, during which reports on the subscription’s web statistics (generated by the selected web statistics component) and traffic statistics (generated by Plesk) will be available.

Log rotation

It enables automatic cleanup and recycling of web server log files, and also allows you to turn on compression of processed log files and sending them to a specific email address.