With PhotoDeck, it is possible to create up to 1000 subgalleries under any gallery, including the root gallery.
For maximum flexibility and ease of management, you should organize your galleries like you would organize folders on your computer, creating a "category" of galleries for each type of galleries you will create.
Even if you can change the structure later on, it is advisable to do it right initially, especially if search engines (Google) are important to you: changing the structure might affect individual galleries' URLs.
If you plan to use PhotoDeck for a single purpose (for example, portfolio display or stock), you can skip this step. But if you feel you even might use PhotoDeck for multiple purposes in the future (e.g. public galleries AND protected client galleries), we recommend to create the proper structure upfront.
Gallery structure illustration
Here are a few important examples - you don't need to create them all at once:
Note that when a gallery is empty, it is not visible on your website.