gpg: WARNING

[Vinay M]

Hi,

When I run command "gpg --verify <file.sig>" I get the below mentioned
warning.

gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the
owner.

1. I want to avoid this warning. How do I do that ?
2. Is this avoidable if I go with a trusted signature?
3. What does this warning exactly mean ?

Thanks,
Vinay
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