• Data
• Events
• Attributes
• Data schemas

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• Documentation
• Development approach
• Consent handling
• Personally identifiable information
• Trackers
• Further reading

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• Implementation progress

Attribute user_id

• Name: user_id
• Value: ID of the user that has interacted with a form
• Example: random consistent string
• Required: false
• Type: string
• Redact: false
• GTM/GA4 parameter name: user_id
• GA4 display name: User ID