The Files app that Apple introduced in iOS 11 gave its mobile software a much-needed hub for managing documents, photos, and other content across your device and cloud services. With Apple's app, you can access files saved to your iCloud Drive account as well as content stored in services like Google Drive, Box, Dropbox, and OneDrive among others all in one place.
But in most situations, I often find myself navigating directly to the cloud service I'm using, like Google Drive for instance, rather than going through Apple's Files app. And when it comes to saving files locally on my iPad, I found that the Files app required me to choose an existing folder, like Pages or Keynote, rather than creating a new one.
It's possible to create new folders within those folders, but based on my experience and Apple's support page it looks like you must choose one of those folders first before making a fresh one. This isn't quite as seamless as just right clicking to create a new folder on the desktop like you can do in macOS.