YITH Deals for WooCommerce plugin you can apply this strategy in the easiest way, by displaying a popup
PLUGIN FEATURES
- Show the offer in page "Checkout"
- Inline the offer with page content
- Show offer in popup
- Show offer in popover
- Change pop-up size
- Set restriction rules
- Category
- Geolocalization
- Price
- Product
- User role
- Tag
- User ID
- Add or remove products in cart when the offer is accepted
- Show another offer is the current offer is rejected
- Choose the product(s) you want to add in the offer
- Choose the type of offer you want to apply: percentage discount, price discount or fixed product price
- Set the time period of when the offer will be shown