Known-item search is a mode of seeking information where users know exactly what they want, can describe it in words, and often know where to start looking. This type of search is highly focused and precise, making it easier for users to find the specific information or item they need. For example, imagine someone looking for a specific book on an online bookstore. They know the title and author, so they enter this information into the search bar. The website quickly displays the exact book they're looking for, along with purchasing options and related recommendations. This direct approach saves time and effort, allowing users to achieve their goal efficiently.

Known-item search is common in scenarios where users have clear, defined needs. It highlights the importance of having effective search functionality and intuitive navigation to help users locate their target quickly.