Choose and promote products to offer to your customer as upselling before paying the order.
You can encourage customers to purchase a product/service with a special offer just when they are more inclined to complete their purchase.
You will increase the conversions of the discounted product (based on studies, 30% of customers takes advantage of the offer) and global sales on your store.

ToolKit For Elementor Plugin
JetTricks For Elementor
Advanced Woo Search Pro
Openpos WooCommerce Point Of Sale(POS)
JetThemeCore For Elementor
BuddyPress User Badges
Aliexpress Dropshipping and Fulfillment
WooCommerce Abandoned Cart Recovery Premium
LMSmart - Education WordPress Theme 
