By enabling products you are choosing which products should have the Make an Offer feature and what is the unrevealed acceptable price(maximum discount percentage allowed) on each product. You can also enable collections to have the whole collection enabled.
Open the app at Shopify admin apps section.
- Click on Manage Products button to enable individual products.
2. Enter your Accept Price (least acceptable price) for product variants & Save. This is the price you are guaranteed to get and the negotiation will never close below this price. This will not be revealed to the shopper.
Thats it. Your product page should now have the Make an Offer button shown (below the Add To Cart button by default).
If the Make an Offer button is not showing up, please check out this trouble shooting article.