Site mapping is the process of creating a visual representation of a website's structure and content. It outlines the various pages, their relationships, and how users can navigate through the site. This helps in organizing information logically, ensuring that visitors can easily find what they are looking for. A site map can be created in different formats, such as a simple list or a more complex diagram. It is often used during the planning phase of web development to guide designers and developers. Tools like Lucidchart or MindMeister can assist in creating effective site maps.