Received Database Configuration Assistant Error

Hi dear,
I am receiving given error and don't have the knowledge of given terms such as ASMSNM, ASM.
Please describe these terms and give me an answer on the error, in a simple way so that I can understand all steps easily.
Details of Error:

Database Configuration Assistant
Could not validate ASMSNMP Password due to following an error – “ORA-01031: insufficient privileges
Do you want to continue?
If you continue, ASM will not be configured to be monitored by Database Control.
Retry Continue
Thanks in advance.
