I was reading this page on using LogDNA in IBM Cloud
https://cloud.ibm.com/docs/services/Log-Analysis-with-LogDNA?topic=LogDNA-about#about
It mentions that "Log data is sent to a third party". What exactly does it mean by sent to third party? Does it mean that we need to make sure that we cannot log any personally identifiable data or any other kind of data that might not be suitable to sent to a third party? I am just trying to understand if there are any best practices on what can be logged/what cannot be logged in this case.