Web pages and Web sites are allowed to be copyrighted. In many ways they are no different then a book. However, unlike a book, a web site may change its content, and thus a copyright may not be in the web sites best interest. Copyright law provides that a unique collection of words may be copyrighted. Or, in other words, no one can replicate or duplicate your words, without your permission. For example, if you write a book, no one will be able to replicate your story without your permission.
Web sites create a unique issue in that they are constantly “updating.” If you update or change your web site, it will increase the difficulty in obtaining a copyright, since a copyright must generally be in a “fixed” (unchanged) format. Therefore, while it is possible to copyright your web site, it may be better to use other legal methods to protect your material.