What is Dynamic workflow & when is it triggered

[dasbiswa]

What is Dynamic workflow & when is it triggered?

[Ashish Kumar Ag]

There is nothing called dynamic workflow. Workflow Concepts - ServiceNow Wiki

Depending on the workflow condition it get triggered. Creating a Workflow - ServiceNow Wiki

You can also trigger a workflow from business rule.

If you are referring to dynamic variable, check Dynamic Variables for workflow approval

[Brad Tilton]

The graphical workflow typically gets triggered when a record is updated and meets the conditions on the workflow properties. The exceptions are the RITM workflows, which are linked to the items through the workflow field on the catalog item record and those don't get instantiated until the request is approved. The other exception is the SLA workflow which is linked through the SLA definition record.