For example, many professors publish their syllabi, course material and, in some cases, their scholarship, on their personal Web pages. They can be relatively mainstream or radical in interests and vary widely in credibility of information. Special interest sites are, by their nature, biased. When using such sources, your readers should be aware of the source's special interest. They can include research, reference sources, fact sheets.
Many institutions provide such services to the public.
The credibility of the institution or professional credential of the individual providing the facts gives clues as to the reliability of the information. If so, the credibility of the information is connected to the originating sites. As in print - just because information is published does not necessarily mean it is true. Although many legitimate businesses have Websites, some are not legitimate. Companies, with good and bad reputations, are in the business of making money and acquiring and keeping customers.