This excellent 3 minute video from NC State University Libraries explains what credible sources are, why it's important to use them, and how to determine if sources are credible. Click the box in the left bottom corner to make it appear full screen.
Deciding whether information you find online is reliable is a challenge! Following the SIFT method will help. Check out the information below and also the Library Blog post about the SIFT method.
This series of 4 short videos give you the tools and methods you need to quickly evaluate information using the SIFT method
Original source and lots more descriptive text: SIFT: the four moves by Mike Caulfield