There are often sections which need to be in more than one place. For example, say you've a few products, A, B and C, and you've created a section for each. Now you want to create troubleshooting content. Where do you put it?

Some customers will look for a troubleshooting section on the homepage, and then go into a sub-section for the relevant product. And others will go to the product first and then look for the troubleshooting sub-section. 

Both approaches are meaningful and common. But they're mutually exclusive, and no matter how you frame things you'll be confusing or disadvantaging some of your customers.

In other words, you need to put the troubleshooting sections in two places.

This applies to lots more things. For example, there's a lot of things you do when you're onboarding / getting started that you may also want to do later as well. But at that point you may not think to look in the 'get started' section. It would be good to put a section or sub-section of the 'getting started' content in multiple places.

So: at the moment you can't dual-locate sections. This creates inflexible structures which don't work for all customers. So it would be awesome to be able to dual-locate sections.