What does "Update field" do in Automation?

DESCRIPTION:

The term "update field" refers to a type of step that can be incorporated into your drip campaign.

The update field step is unique as it allows you to change a subscriber record based on behavior in the drip. Update Field will add a value to a contact’s demographics or add them to a category defined in the step.

HOW-TO:

Drag the Update Field element over to the desired section of your workflow. Click the pencil to set your update specifications:

In the example seen above, we update the Rewards Level contact field if a subscriber clicks to share our mailing to Twitter. We could have also placed them into a new or existing category.