What are trusted credentials on my Android phone?

Trusted credentials. Trusted credentials. This setting lists the certificate authority (CA) companies that this device regards as “trusted” for purposes of verifying the identity of a server, and allows you to mark one or more authorities as not trusted.

What happen if I clear trusted credentials on my Android phone?

Removing all credentials will delete both the certificate you installed and those added by your device. … Before you clear all your credentials, you may want to view them first. Click on trusted credentials to view device-installed certificates and user credentials to see those installed by you.