The page_description object

Returns the description of a page set in its respective section in the admin.

The page_description can be used for providing a brief description of a page in search engine listings and posts shared in social media feeds.

For product, page, collection, blog, and blog article resources, the page_description is taken from the search engine listing settings. For the homepage, the page_description is taken from the online store's preferences in the admin. Learn more about editing titles and meta descriptions.

The search engine listing preview settings of a Shopify page