What criteria would you sue to evaluate the authenticity and credibility of the information in a web site?

I would check the information given on the website everyday. If it doesn't apply to what I'm searching for, then I would close the website. I ONLY go on YouTube and iTunes on my spare time. On school nights, I would go on Facebook to ask my friends about homework and Microsoft Word for typing a lab report. Sometimes the sources I use provide the best information it gives me because it's evaluates if the website is credible or not.