Here are some factors to consider when determining whether a website contains reliable information:
Who is responsible for the webpage? What authority or expertise does the author have?
When was the page created? When was the page last updated?
What are the goals and objectives of the page? Is the page trying to get you to buy something?
Are there links to other resources? If so, are those resources reliable?
Is the webpage well organized and easy to navigate? Does the page include help or search sections?