A polished website can be useful, misleading or simply out of date. Before you rely on its advice, separate the appearance of authority from the evidence behind a particular statement. You do not need to investigate every page like a professional researcher. A short sequence of checks can reveal whether a source deserves a place in your notes or needs a second opinion.
Start with the question you need answered
Write down the decision the page is meant to support. Choosing a recipe, checking a public-service deadline and comparing a paid subscription involve different consequences. The more a mistake would cost you, the stronger the evidence you should seek. This gives your checking a purpose instead of becoming an endless search for a perfect website.
Identify the claim that matters most. An article may contain a sound explanation alongside an unsupported recommendation. Copy that specific statement into your notes, record the page address and note the date you visited. You can then check the claim itself rather than accepting or rejecting the entire site on instinct.
Find who is responsible
Look for an author, an organisation name and a meaningful explanation of what that organisation does. Follow the About and Contact links rather than stopping at a professional-looking logo. A named author can help you investigate relevant experience, but the presence of a name alone does not establish that a claim is accurate.

Check whether the organisation has a reason to favour one outcome. A supplier explaining its own product may be the best source for specifications, yet a weaker source for a broad claim that its product is superior. Record that commercial context beside the useful information instead of treating all commercial writing as automatically worthless.
Inspect the evidence trail
Open the references attached to the important claim. Does the linked document actually say what the article suggests, and does it concern the same people, place or product version? A link to a large institution's homepage is much less informative than a direct link to the relevant report, dataset or published guidance.
Notice the difference between an observation and an interpretation. A survey might report what respondents said, while an article turns that into a claim about everyone. Keep the sample, date and limitations with your notes. If no evidence is provided, search for the original statement using a distinctive phrase and the organisation's name.
Check time and context
Find a publication date and, where available, a genuine revision history. A recent date in the footer may only indicate the current year. Software instructions can become obsolete after an interface changes; a travel guide can remain useful for geography while its transport details need rechecking. Match the age of the evidence to your task.

Compare one important point with an independent source. Independence matters more than finding several websites repeating the same wording. If five articles all cite one press release, you have one underlying source. A second source that uses a different dataset, method or responsible institution adds more useful perspective.
Make a proportionate decision
Classify the page as useful for background, useful for a specific verified fact, or unsuitable for the decision at hand. These categories are more helpful than a single trustworthy-or-untrustworthy label. You might retain a clear illustration from a weakly referenced article while relying on official documentation for the instructions you will follow.
Finish with a one-sentence note explaining your choice: who published the page, which claim you checked and what remains uncertain. This small record saves work when you return later. It also makes it easier to explain your reasoning to a colleague without relying on the vague impression that a website looked convincing.
Further reading: MIT Libraries: evaluate information


