Download and install Dropbox if you haven't already.
Go to the DropPages dashboard and sign into Dropbox. This will give DropPages access to create a folder in your Dropbox where your sites can be stored.
Choose a subscription plan and enter your card details to start your 7-day free trial. Your card will not be charged until your trial has ended, you can cancel anytime before that.
Click the "Create a new site" button and choose a domain name. DropPages will create a website folder in your Dropbox, you can add files here and they will be automatically published online.
Read the documentation to learn about folder layout, formatting, pages, templates and more.