The Answering Rules icon will take you to your Answering Rules center. Answering Rules are how you control what devices ring, how long those devices ring for when receiving a call. It is also where you can configure what to do with a call that goes unanswered.
Clicking the Answering Rules icon will take you to your Answering Rules center where you will see your answering rules listed. Every account is configured with a Default rule that cannot be deleted.
If you have multiple answering rules configured, the Answering Rule that is currently in effect will say Active next to the rule. Every rule is displayed with their name, with a description of how the rule will route the call and the options to edit or delete the rule.