Search in SharePoint installations is still a pain point for many users. However, what they do not realize is that their ability to find information is not because search is not powerful enough—it is! The information is there; unfortunately, it is presented like the thousands of letters dumped on the judge’s desk in “Miracle on 34th Street”: overwhelming.
Configuring search is a function for power users, not IT. Much is written about SharePoint 2013 search in terms of architecture and infrastructure configuration, and that information typically targets the IT department, where search is implemented. But search is a tool for the business user to configure and provide upkeep. The best analogy I have heard in this regard is from Jeff Fried of BA Insight: Search is like gardening. It takes constant attention and pruning.