For your work to meet assessment criteria at a university level you need to be able to substantiate your research with acceptable sources. The growth of the WWW makes it even more important for you to be able to evaluate information critically, since much of the information on the web may be highly biased. Evaluation begins when you look for information and you are deciding whether it is worth walking upstairs to get a book off the shelf, or following a particular link on a web page. Doing this efficiently can save you a lot of time and effort. Once you have a piece of information, you need to decide whether it can be used in your work, and whether the information is reliable.
Updates imply that changes have been made.
Find the right site for your needs. Once you have decided to pursue a source and have it in front of you, you need to decide whether it is as useful as it first seemed. In some cases this will become clear from scanning the contents or index, but you may need to skim a few sections to be sure. There are a number of factors that you should consider to help you decide whether a piece of information is appropriate to your needs. Material can be written with distinct audiences in mind.