A keyword search on Google.com can be a great way to learn more about many topics. Enter a few terms and receive results in under a second or so. Typically, the displayed results will either give you the answer you seek or provide a link to a relevant page.
But when you want to explore a topic in depth, you can improve the usefulness of your results with a few simple search techniques. For example, I was helping a non-profit organization identify potential case management software solutions. The basic search of the three keywords returned more than 2 billion results. A few search refinements narrowed the results to just over 76,000.