# Blocks

* This category allows you to add and configure various functional blocks that can be placed on the checkout page. These blocks include features like upsells, gift options, address validation, and other customizable functionalities that help to enhance the checkout experience. You can easily drag and drop blocks into the checkout customizer page, allowing you to tailor the page according to your store’s needs.
* &#x20;**Key Features:**
  1. Upsell blocks to encourage customers to add more products.
  2. Gift product options, including gift wrapping and personalized messages.
  3. Address validation tools to ensure customers provide correct shipping information.
*   **Checkout Extension Blocks - Features Overview**

    The Checkout Extension Blocks offer various functionalities to enhance the checkout page, helping increase sales, improve customer experience, and streamline the purchasing process. Below is an overview of each extension block, how to enable it, and how to use it.
