Using metafield for short description
The introduction of metafields with OS 2.0 added a new depth to Shopify themes and allowed an easier setup for merchants to be able to add unique content to their products beyond the standard description and images offered in the Shopify admin.
Support for some metafield definitions will very much depend on your theme & version. Where blocks that contain text are available for selection, metafields that include text content should work without issue. Where images or references to products are selected it is likely that code will need to be modified as each theme will have its own content options.