Once you've found information on your topic, it is important that you evaluate the information to make sure it is considered "good quality."
Since anyone can publish on the web, you simply cannot believe everything that you read. In addition, different types of publications are intended for different audiences and different purposes. When you are doing research, it is important to critically evaluate each source to determine who is publishing it, what is the purpose of the publication, and whether or not it includes accurate information.
Use the library's Research Process: Getting Started to learn more about finding, evaluating, and citing sources.