There are three levels of protection that help Trend Micro™ Security (for Macintosh) determine whether to block access to a Web site.
Protection Strength
High: blocks Web sites that are unrated, a Web threat, very likely to be a Web threat, or likely to be a Web threat.
Medium: blocks Web sites that are a Web threat, or very likely to be a Web threat.
Low: blocks only Web sites that are a Web threat.