Site Inspector notifies you when your site goes down!
Unfortunately it is unavoidable fact that sites sometimes go offline. It can happen because of hardware issues, bugs in a software, unexpected traffic, or other problems.
Site that went offline can become a nightmare - prospective clients will go to another website, existing customers will be unsatisfied with a service, paid traffic from advertisements will be waisted, etc.
Site Inspector checks all your websites, and if at least one of them is offline, it will notify you. Now you just need to call your IT guy, restart server, or fix other problems!