As part of our due diligence, we highly recommend periodic updates of Drupal CMS core and modules utilised to create your website in order to keep up-to-date with the latest security and stability updates. The intention is to reduce the likelihood and severity of website compromise (which may be either automated or targetted) against your website.
We recognise that even with security and stability updates in place, it is still possible for sites to be compromised (requiring immediate action on our behalf to mitigate etc).
Note: We regard this service as an optional (but highly recommended) ongoing cost. Clients who decide not to subscribe recognise that their websites are at increased risk.