What is SMART?

Secure Malware Alert and Removal Tool (SMART), if enabled, performs an in-depth site scan and automatically removes malicious code from files on the site. SiteLock makes calls to the web server and replicates the website files on their secure servers and scans the contents thoroughly to identify malicious code or vulnerabilities. In the course of doing this, it can also remove the malicious code from the files, to prevent further damage.

You can choose to not allow SMART to remove any code. In that case, you will only be notified of the vulnerability identified, and you will need to manually check / remove it.