# Implement Carts

Learn how to manage the complete Cart lifecycle, from creating and merging to implementing critical security patterns.

**Learning objectives**

After completing this module, you should be able to:

- Design a Cart implementation strategy by selecting the appropriate scope (Project vs. Store) for a given business requirement.
- Manage the complete Cart lifecycle, including creation, retrieval, updates, and merges using the commercetools SDK.
- Implement robust error handling and critical security checks for all Cart-related operations.

**Agenda**

1. [Understand the Carts API](/learning-implement-carts-and-shopping-lists/implement-carts/understand-the-carts-api.md)
2. [Find and manage existing Carts](/learning-implement-carts-and-shopping-lists/implement-carts/find-and-manage-existing-carts.md)
3. [Create Carts](/learning-implement-carts-and-shopping-lists/implement-carts/create-carts.md)
4. [Update Carts](/learning-implement-carts-and-shopping-lists/implement-carts/update-carts.md)
5. [Manage Cart sessions and merges](/learning-implement-carts-and-shopping-lists/implement-carts/manage-cart-sessions-and-merges.md)
6. [Handle errors in Cart management](/learning-implement-carts-and-shopping-lists/implement-carts/handle-errors-in-cart-management.md)
7. [Learning check](/learning-implement-carts-and-shopping-lists/implement-carts/learning-check.md)

**Prerequisites**

- [Developer essentials](/learning-developer-essentials) learning path
- [Price and discount your products](/learning-price-and-discount-your-products) learning path
- [Inventory modeling](/learning-model-your-product-catalog/inventory-modeling/overview.md) module

**Audience**

- Digital commerce developers who need to implement Cart functionalities.
- System architects designing digital commerce solutions with commercetools.
- Anyone interested in understanding advanced Cart management within commercetools.

## Related pages

- [Area overview page with navigation](/learning-implement-carts-and-shopping-lists.md)
- [Next page: Understand the Carts API](/learning-implement-carts-and-shopping-lists/implement-carts/understand-the-carts-api.md)
- [Search documentation and API specs](/search.md)