# 3.4 Apply a common tag for each order:

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If you select a tag from this option, when someone places an order, this tag will be applied to that contact. By this tag, you can **trigger** a workflow. Keep in mind, that if you use this tag to trigger a workflow, you need to **remove that tag** at some point of that workflow. Otherwise, it won't work the next time if that specific tag is already applied to the contact.
