GA4 - view_promotion

window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
  event: 'view_promotion',
  ecommerce: {
    items: [{
      promotion_id: 'abc123',                             // Required. Promotion Campaign ID - Type: String
      promotion_name: 'summer_promo',                     // Required. Promotion Campaign Name - Type: String
      creative_name: 'family_in_bathing_suits_1',         // Promotion Creative Name - Type: String
      creative_slot: '1',                                 // Promotion Creative Slot - Type: Integer
      location_id: 'hero_banner'                          // Promotion Creative Location ID - Type: String
    },{
      promotion_id: 'wc2020',
      promotion_name: 'winter_campaign_2020',
      creative_name: 'family_in_winter_clothes_1',
      creative_slot: '2',
      location_id: 'hero_banner'
    }]
  }
});