When you download Pages for the first time this screen will greet you. In order to use iCloud you will need to have the system set up on your iPad.
As long as everything is set up correctly you should see this screen. Go ahead and tap the Use iCloud button in the bottom-right of the screen to get to the next step.
You can now go ahead and create new documents knowing that at regular intervals (provided you are on Wi-Fi) your changes will be saved to the cloud so they can be viewed and edited from the web.
Head to www.icloud.com and sign in with your iCloud ID; you will then see the above screen. Click on iWork to the right to see your saved documents.
This next screen will show your saved documents. Use the tabs at the top of the page to navigate between Pages, Numbers and Keynote documents.
Click on a document and immediately you will see that you are able to download it to your Mac. Click on the Download button to begin the process.
The system gives you the option of multiple formats so if you aren’t on your home Mac, and can’t use iWork, you can still retrieve and view the document.
With your choice made, you may need to wait while a conversion takes place. Depending on your connection and document size, this can take a few minutes.
Other options are available so you can also upload documents to the cloud. Click on the Settings button and you will see the above pop-up menu appear.