Hello,

Navigate to Theme Settings > Product Archive > Product Styles > Choose the “show summary on hover” product style. Then show “excerpt” in the Hover content in the Theme Settings > Product Archives > Product Styles.

This product style will show your short description on grid products.
https://monosnap.com/file/swCqK6RIIrYuhoROH6YOkEfBjfPMKx

If you have any questions feel free to contact us.

Best Regards.