How do I use dynamic data from a custom event attribute in a push notification?

You can insert a custom event's attribute value straight into a push notification from a Customer Journey — you don't need to copy it into a user Tag first.

Recommended: personalize with event attributes (Dynamic Content)

1. Start the journey with the event that carries the data, or add a Wait for trigger element for it earlier in the flow.
2. Save your message content as a preset. Personalization from event attributes is available for presets only.
3. Open the Push element on the canvas and turn on Personalize message with event attributes, then choose which placeholder each event attribute should populate.

Alternative: Liquid placeholders

Enable Overwrite Liquid placeholders on the element and select the event. Where an attribute name matches the tag name used in the message, the attribute value is substituted. Use this when you need more flexibility — for example rendering a list of purchased items and their prices rather than a single value.

When you do still need a Tag

If you are writing custom (inline) content instead of using a preset, event-attribute personalization is not available — custom content can only be personalized with Tag values. In that case:

1. Add an Update user profile element after the event and write the attribute value into a user Tag.
2. Insert that Tag's placeholder (for example {{your_tag_name}}) in the message content.

If the data you need is already stored as a standard user Tag, simply use that Tag's placeholder directly.

See Dynamic Content and Liquid Templates in journeys.