Like articles, conference papers are a valuable source for finding research results. It is also is a good place to become acquainted with the work of researchers in your area of interest. Many databases that index articles also index conference papers.
When searching for a conference paper, keep in mind that many conference papers are compiled with the other papers of that conference and published as a book. If that's the case, it's important to use the title of the compilation rather than your individual paper in order to find a copy.