You can easily set a “catalog price rule” in your PrestaShop back office.
Go to "Price Rules"> "Catalog Price Rules" and create a new rule.
This will allow you to select various criteria and the amount or percentage of reduction that you would like to apply to all related products.
You can also cumulate criteria, for example:
- For all products in the T-shirt category
- With "XXXXX" as a manufacturer
- and with the color "Blue"
=> Apply a 30% discount
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