An Asset has your personal content in it - information about you or something that you have done that makes it meaningful. You own your Assets and have full control over editing and sharing. You decide who sees which of your Assets, for how long, and what they can do with them.
A Resource is something you use to create an Asset. A Resource provides structure and scaffolding so that you can input information. It is an empty form or template that you can add your content to. It is typically made available to you by PebblePad or by others who are facilitating activities that you need to complete. When you save your content in a Resource it saves as an Asset in your Asset Store.
Please see the video below for more details on the differences between Assets and Resources in PebblePad.