The CSS API is an evolution of the CSS features in Content API for Shopping.

The CSS API provides the following robust tools for managing your CSS
operations:

- **CSS label management**: Lets you place Shopping ads on Google on behalf of merchants in countries where the CSS program is available.
- **Account organization**: Efficiently categorize and manage associated accounts. CSS domains and CSS groups can make use of labels to organize their linked accounts.
- **CSS domain administration**: CSS domains can list, label, and filter Merchant Center accounts associated with a domain.
- **CSS group oversight**: CSS groups can label and list the CSS domains affiliated with a group.

You can use the CSS API to manage your CSS and control your CSS Products
portfolio.

## Advantages

Upgrading to the CSS API offers the following advantages:

- New features:
  - CSS Product Management enables direct CSS product uploads.
  - Enhanced Account and Label Management enable better client organization.
  - The Quota Service lets you monitor API usage.
- Improved alignment with [Google's API improvement
  proposals](https://google.aip.dev/general).
- CSS Products are only available in the CSS API.
- Updated documentation and samples.