Order

Instruction to buy or sell.

Educational content only. This page does not provide investment, legal, or regulatory advice.

Why it matters

Order matters because it affects financial interpretation, product decisions, and industry communication.

Order is commonly explained through its core definition and the practical example used in the glossary.

A common mistake is to use Order without understanding its operational and regulatory context.

Order may vary across payment rails, regulations, and market practices.

3D Secure

Security protocol for online cards.

Account Abstraction

Smart contracts as wallets.

Account Updater

A service that refreshes expired or reissued card details for recurring billing merchants.

Algorithmic Trading

Trading using automated algorithms.

API

Application Programming Interface.

API Banking

Banking services provided via APIs.

Google Search Central

Google Search Central: Helpful, reliable, people-first content

Defines trust, helpfulness, and people-first expectations for YMYL-adjacent content.

Google Search Central

Google Search Central: Title links best practices

Supports title hygiene and metadata governance.

Adyen

Adyen: Payment methods glossary

Reference source for payments terminology clusters.

Author

Founder and multilingual fintech glossary editor

Reviewer

Editorial and source review layer

Reviewed

3/15/2026