The wearing of a red or white carnation on Mother's Day historically was a visual clue to whether one's mother was living (red) or dead (white). An observer did not have to ask an awkward question because the answer was obvious.
Does your digital library contain those obvious clues that people need when they visit the site, for example to tell them what is there, what to do, and who to ask for help? Do you make them ask questions that you could have answered upfront? Or worse -- do people leave the site, without using it, because there were no clues to tell them what to do?