How do you know what information online is trustworthy? Do what fact checkers do, and use Lateral Reading.
Open a new tab in your browser.
Search the name of the unfamiliar source.
Check what trustworthy sites say about it.
If the source seems untrustworthy, don't waste your time on it. Find a better source.
from Lateral Reading Poster developed by Civic Online Reasoning & Stanford History Education Group
It is important to evaluate all information you encounter, but it is especially important to be critical of the information you find on the web. Does it pass the CRAAP test?