An overview of our rater guidelines for Search

At Google, we like to say that Search is not a solved problem: We’re constantly making improvements (more than 4,800 last year alone). These changes can be big launches or small tune-ups, but they’re all designed to make Search work better for you, and to make sure you can find relevant, high quality information when you need it.One of the key ways we determine if an improvement to Search works well is through the help of search quality raters. This group of more than 10,000 people all over the world work from a common set of search quality rater guidelines used to evaluate the quality of search results — which are publicly available. Today, we wanted to give you an idea of how these guidelines work, and how — just like Search itself — they improve over time.