> For the complete documentation index, see [llms.txt](https://developers.doku.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.doku.com/accept-payments/doku-checkout/additional-feature.md).

# Additional Feature

Discover how our advanced tokenization ensures secure, streamlined transactions, and explore the Promo Engine to maximize your savings with exclusive offers and discounts. Enhance your checkout experience with these powerful tools.