A system and method for categorizing content on a webpage is disclosed. The method comprises receiving a request for a webpage from a user's computer. Next, the system determines whether there is dynamic content on the webpage by analyzing the address, links, reputation, type, style and other indicators of being able to easily change the webpage. If the webpage contains content that can be changed, then the webpage is analyzed to determine a current categorization thereof. If the webpage does not have dynamic content then the categorization of the webpage will remain the same thereby freeing system resources by only analyzing dynamic webpages.