Sometimes, you can judge how reliable website information is by noting the URL ending.
.GOV - refers to a government website. Highly reliable.
.EDU - often refers to a reliable educational website.
.ORG - implies a non-profit ORGanization. Approach with skepticism.
.COM - stands for "Commerce" and is used for business. Approach with skepticism.
Evaluate information sources further using the CRAAP test, developed by research librarians at U. California, Chico.