Check the Author is qualified to write about the topic, and the Publisher is clear
Check the Domain name (e.g. .com), is likely to contain credible information:
.gov or .edu are from government or educational institutions and are trustworthy
.asn or .org are used for non-commercial organisations e.g. incorporated associations, political parties, professional associations. Assess information carefully, e.g. compare wikipedia.org with cancer.org.au
Check the Date on the web page, if the information is recent, or if not, is it still valid?
Check the Coverage in terms of time period, or level of detail in relation to the topic.
Check the Content information is not biased. Is the information correct compared to other credible sources (such as scholarly books)
authors not stated or qualified to write about the topic. There may be a commercial interest, e.g. drug companies
domain name .com, be wary of these sites as information may be presented to support commercial interests
be aware that information can be presented as fact, when it is actually opinion
could information be biased by the interests of the organisation, rather than research or evidence?