Example Gallery Asset
An asset is just a chunk of code that was created for you that you can place on as many pages of the website as you wish. When an asset is updated then every place that asset has been placed will be updated.
The gallery below is an an asset. The "v-card" at the bottom of this page that lists my contact information is an asset. And the text asset showing the tuition fee of "$237 per unit in addition to the enrollment fee of $46 per unit" is an asset.