McAfee first explains why past knowledge management "solutions" rarely solved anything. He then explains what makes Web 2.0 technologies different. "The good news," he writes, is that the new technologies "focus not on capturing knowledge itself, but rather on the practices and output of knowledge workers." By providing both a platform for collaboration and a means of recording the details of the collaboration, the technologies create a public record of previously private knowledge-sharing conversations, a record that's permanent and easily searched. Knowledge is captured, in other words, as it's created, without requiring any additional work. As people search and use that knowledge, moreover, they refine it - through commenting, linking, syndicating and tagging, for instance - which makes it even more valuable.