Before guiding marketers through ways to identify canonical URLs for large, data-driven sites, Pete Meyers outlines the biggest misunderstanding people have about pages on their Web sites. He tells us most often think of a page as a "physical file containing code," but to a Web crawler a page looks like a unique URL. He tells us one file could generate thousands of unique URLs, and each one is potentially a page in the eyes of an engine. Meyers describes how to track URLs, identify product pages, and know the engines crawl path across company sites.