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Another example: if you have an important message to your audience (a special promo, delayed shipping) and want it to be visible on every subpage, just drag and drop a text module on your Page Base, write as sentence or two and provide a link to a page with the details. The message will then show above/below your menu and you will be able to update or switch it off with a couple clicks.
The Placeholder module is always needed in the Page Base. It denotes the place in which content of pages created with the Editor, product details and category pages will be displayed. So everything you will set up in Category Base and Product Base will “go into“ the Placeholder. You don’t need to drag and drop the same set of modules on these bases again.
On most websites everything above the Placeholder will be the header while everything below, the footer.
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