Metafields: Custom fields to store additional information about products, collections, customers, orders, etc.
Log in to Shopify Admin.
Click Settings in the left-hand menu.
Select Settings > Custom data > select and metafield Eg:(Products) > Add definitions
Click Add Definition.
Enter a Name (e.g., "deal_timer").
Select a Namespace & Key (e.g., custom.deal_timer).
Choose a Type (e.g.,date and time) and set minimum and maxmium value
Click save
Go to Products in the Shopify Admin.
Select a Product and scroll down to the Metafields section.
Click Add Value and enter the required information.
Click Save.
Go to Shopify Admin > Online Store > Themes.
Click Customize on your active theme.
Enable product deal timer
It will be visible in the products
