The Web is sneaky. It is flashy and pretty, but even a professional-looking website can harbor questionable scholarship ― ideas and “facts” that no one should take seriously, much less quote or cite in an academic paper.
Below is a short list of qualities you should look for anytime you find a source on the web: credibility, accuracy, the reasonableness of its opinions, and the support it provides for its conclusions.
Remember that you're not looking for perfection; no website will meet each and every one of these criteria. But a source that has most of these qualities is a better bet than one that has few or none.
These online reference sources from Lindell Library give you background information that you can use to check the accuracy of a website's contents.
It's okay if the website or its sponsors are biased; there is no such thing as an unbiased source. But it should be clear that they are more concerned with presenting the truth and engaging reasonable opinion than with selling you a product.