About a Flow alias
A Flow alias is similar to a Flow ID. However, it is a Flow identifier that is intentionally decoupled from a Flow ID. If a Flow changes, invoking it based on an alias that's associated to a version of your Flow can occur.
If you're using the Okta Workflows API, the following routes need the Flow alias:
Invoking a Flow
Resuming a Flow
Retrying a Flow
Generating an Open API Specification
For more information about these routes, see Okta API documentation.