A log line is a sentence that explains a story in a short and simple way. It's like telling someone about a movie or a book in just one sentence. For example, the log line for the movie "Jurassic Park" could be "Scientists create dinosaurs in a theme park, but things go wrong and the dinosaurs escape." A log line is important because it helps people understand what the story is about quickly and easily. It's like a sneak peek into the story before actually reading or watching it.