ProContent / First Time Use
Be sure the page item is selected for the pages you want to use this on. It doesn't hurt to turn it on for all pages (click on Pages, then click the items tab and edit the Pro_Content item, then select all pages and save.)
You can have different content come up for each page without having to edit each page. Works for categories as well and is quite useful when working with different products where you'd like to put various things related to a products all over the page instead of just inside the product display area.
Now, every time someone goes to the page/category/product you made content for, it will come up in the spot where you put the page item. If you put it in any of the global elements such as global header, navbar, category tree listing, etc..., you'll definitely need to turn the ProContent item on in each page.
You create content and it comes up where you want it to.
What if you have an announcement for just one of your products and want all the others to say something else? You could make new content for every single product. Or you could do it the easy way.