Using the Additional Description module for product promotion in Opencart, you can add universal text with keywords to the beginning or end of the product description.

Thanks to macros, you can easily select the appropriate text for the product description, including such data as name, model, price and other parameters.

Купить модуль: Дополнительное описание для продвижения товаров
Модули для Opencart https://ocmarket.org/extension/
Скачать opencart: https://ocmarket.org/loader/