The document discusses the differences between information found through general search engines on the free web versus subscribed databases that are part of the invisible web. It notes that free web results can come from anyone and the searcher is responsible for determining accuracy, while database results have undergone an editing process by scholars and ensure accuracy. It provides guidelines for when it is and isn't appropriate to use the free web based on the type of information needed and the searcher's expertise. It also lists some example websites to demonstrate credible versus non-credible sources. It concludes by suggesting the library can help classes by teaching web evaluation techniques and providing an evaluation form.