Clues about a website's reliability can be found in its URL.
Ask: what domain does the website belong to?
A few are listed below:
.com – commercial, anyone can buy these
.net – network, anyone can buy these
.org – organization, original intended for non-profits, now anyone can buy
.edu – education, US colleges and universities
.mil – US military only
.gov – US government only
.it – one of lots of country codes, many of which can be sold for commercial purposes