Searching in bibliographic databases and library catalogues will result in a list of bibliographic references or citations. To make a good selection from such a list, which can be long, you must be able to evaluate these records, and thereby the documents they represent.
The main question you should put yourself is whether the content of the document is appropriate for your research topic or assignment. Is it worth the effort of getting the full text and reading it? Learning how to determine the relevance and authority of a given resource for your research is one of the core skills of the research process.
Part 1 of Module 6 is about evaluation search results from library catalogues and bibliographic databases and part 2 is evaluating search results from the Internet.