One of greatest gifts of the internet is the gift of information. Whether you want to know the history of an ancient tribe, how to install an air conditioner, or the name of an actor from that movie you saw when you were twelve, the web has the answers.
For me, IMDB eliminates hours of searching my mental database for some useless bit of movie trivia. If I want to see a list of movies by a specific actor or director or get dialogue from some 80s sitcom, IMDB gives me the gift of instant information. It still amazes me that people are responsible for researching information that is so precise and so unnecessary at the same time.