1. Core: this badge indicates that the plugin has been built into Grafana.

2. Signed: the plugin's signature was successfully verified.

3. Invalid signature: this plugin has a invalid signature.

4. Modified signature: this plugin has changed since it was signed. This may indicate malicious intent.

5. Unsigned: the plugin is not signed. In this case, as upon loading Grafana checks the plugins signature, Grafana will not load or start it. Furthermore, it will write an error message to the server log.