The document discusses several factors to consider when evaluating the credibility of a website, including the domain extension (.edu, .gov, .org, etc.), the quality of the site design, and the writing style. It notes that while domain extensions like .edu and .gov are generally credible, .org can be used by organizations to persuade rather than educate. Well-designed sites with clear, error-free writing are also signs of reliable information. The document advises verifying any uncertain information with a known credible source like an encyclopedia.