This is especially true of information found on the open web, via Google or other search engines. While there is high-quality information to be found, there is also utter crap. As well as everything else in between. Whether for one of your courses or for your personal use, one of the key parts of the research process is evaluating your information, i.e., using your CRAAP detector.
CRAAP is a good start to evaluating your sources. I recommend also employing lateral reading strategies.