Need of servicecertificate tag

Hello,

We are using WIF  in our application.

We have below tag in our web.config.

Our application works fine even if we comment the below tag.

I just wanted to check what is the use of this tag and is there any security risk if I comment below tag.

Any help will be appreciated.

<serviceCertificate>
        <certificateReference x509FindType="FindBySubjectName" storeLocation="LocalMachine" findValue="*" />
      </serviceCertificate>

Thank you