While it may seem easier to search for information using Google rather than use a library database, you will need to critically evaluate any website you decide to use.
Keep in mind the general criteria for evaluating any source: relevance, authority, accuracy, objectivity, and currency.
Numerous web pages describe how to evaluate a website. Below are some sites that you may find useful.
Evaluating Web Pages: Techniques to Apply & Questions to Ask
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/Evaluate.html
Website Evaluation Wizard
http://21cif.com/tools/evaluate/
Five criteria for evaluating Web pages (Cornell University)
https://guides.library.cornell.edu/evaluating_Web_pages
Finding accurate, reliable sources of information on the Internet can be a challenge. As a rule of thumb, some of the best information on the web comes from government agencies, educational institutions, and non-profit organizations. However, all sources should be carefully evaluated before you use them. An easy way to remember how to evaluate information is to apply the C.R.A.A.P Test.
Adapted from Blakeslee, Sarah (2004) "The CRAAP Test," LOEX Quarterly, 31(3).