After you've created a great world, sign it! You can provide a title and a description embedded within the file by using a WorldInfo node. The title field provides the name for your world so that the browser can show it. The info field can hold any additional information of interest.

These X3D scenes are adapted directly from the original VRML 2.0 Sourcebook chapter examples. Also available: Introduction to VRML97 SIGGRAPH98 course notes.