Let customers know how much more they need to add to their cart to qualify for free shipping by showing a progress bar in the cart.
How to create a WooCommerce free shipping progress bar
How to create a WooCommerce free shipping progress bar
The Power of The Progress Bar as a Usability Feature
Progress Bar - Devnet
Free Shipping Bar Shopify - Adoric Blog
Free Shipping Progress Bar
Average Order Volume
Customize Shopify Free Shipping Bar to Drive Sales (FREE) - EComposer
AOV Progress Bar
Fera - Essential Free Shipping Upsell