Sure, you found some of the information you need, but the rest of the page content can help you tell just how valid or accurate that information may be. Does the page have a title that in any way reflects the information you found there? If you are researching tigers and the page title is something like "A Day in the Life of a Zoo Tiger", good. If it's "Fierce Animals You May Encounter in a Role Playing Game" - not good. How about a bibliography? If the page includes links to the sources of the information it contains, this is not only a good sign, but may enable you to double-check for accuracy yourself. Can you detect any particular bias to the page? You may find information that looks as if it comes from a medical study, but when you do a little more reading, you will see that the page is geared towards urging you to buy a particular product. If all of the links seem to lead you to a shopping cart, be very suspicious of any information you find there. Excess advertising is also a red flag - many websites do contain ads these days, but the very best, most trustworthy sources still tend to be commercial-free. Finally, take a look at the domain name. Although there is now, for all intents and purposes, no dfference between ".com" and ".org" sites (originally the former were commercial, while the latter were reserved for nonprofits), sites ending in .edu (university) and .gov (government agency) contain information that is for the most part verifiable.