Blacklisting Nodes

https://docs.dremio.com/advanced-administration/monitoring/#blacklisting-nodes
Anyone can help to describe the purpose of the blacklisting nodes and the mechanism of this function?
What situation can be used?
Thanks!

@Ming In case you have a node with a bad disk or any network issue or there is some hardware issue and you do not want Dremio to send down queries to that node then you can blacklist such nodes and Dremio will not consider these nodes for planning and execution