Booster Kit enables businesses to create one-click upsells, in-cart upsells and cross-sells, and thank you page upsells and cross-sells with ready-made templates and full customization. It allows businesses to capture the moment customers add products to a cart and checkout to offer them pre-purchase upsells and cross-sells, increasing the average order value by recommending the right products, free gifts, and service cards. Additionally, businesses can increase customer lifetime value with thank you page upsells and cross-sells.