The Steam Workshop makes it easier than ever for you to submit finished 3D models of items for a chance to have them accepted and incorporated to the actual game. To publish an item to the workshop for consideration, first read the official documentation linked on the right, then click the Steam Workshop button in the main menu of the game.

The Steam Workshop makes it easy to discover or share new content for your game or software. Each title might support slightly different kinds of content in their Workshop, so it's best to check out the official documentation for more details on what can be created and shared in that area.

When you find content under the Free Worlds tab you wish to add to your game, click the 'subscribe' button. In most cases the content will be automatically available the next time you launch the game. But some products require that you go into a dedicated area of the game or software to activate or access the new content.