How to create a custom pixel for Google Ads Remarketing in Shopify

Follow the steps below to create a custom pixel for Google Ads Remarketing

Part 1: Create a custom pixel "PM - Google Ads Remarketing"

1. Click "Settings"
   
   
   
2. Click "Customer events"
   
   
   
   
3. Click "Add custom pixel"
   
   
   
   
   
4. Click the "Pixel name" field and type "PM - Google Ads Remarketing"
   
   
   
   
5. Click "Add pixel"
   
   
6. Click "Permission"
   
   
   
   
7. Select "Not required. (The code has built-in consent handling)
   
   
   
   
8. Click "Data sale" 
   
   
   
   
9. Select "Data collected does not qualify as data sale". (The code has built-in consent handling)
   
   
10. Copy this script

    // Start - ProfitMetrics - Google Ads Remarketing - v1.0
    // Original Code Created by FeedArmy - Modified by ProfitMetrics.io
    
    
    // Step 1: Set Google Ads Conversion ID
    const GOOGLE_ADS_ID = 'AW-123456789';
    
    // Step 2: Set Google Ads Remarketing Country code
    const REMARKETING_COUNTRY_CODE = 'US';
    
    // Step 3: Set ID_TYPE
    // if your products look like shopify_US_123456789_123456798 add the word shopify
    // if your products are sku's add the value 'sku'  like this: const ID_TYPE = 'sku';
    // if your proudcts use the variant id use the value 'variant_id' like this: const ID_TYPE = 'variant_id';
    // if your proudcts use the parent id use the value 'parent_id' like this: const ID_TYPE = 'parent_id';
    
    
    // Consent Control
    const ID_TYPE = 'shopify';
    
    // Consent Configuration
    let customerPrivacyStatus = init.customerPrivacy;
    
    // Default consent values
    let cc_statistics = true;
    let cc_marketing = true;
    
    
    if (!customerPrivacyStatus || 
        customerPrivacyStatus.analyticsProcessingAllowed === undefined || 
        customerPrivacyStatus.marketingAllowed === undefined) {
      try {
        const cmp_a = await browser.cookie.get('_cmp_a');
        const cookiedecoded = JSON.parse(decodeURIComponent(cmp_a));
        cc_statistics = cookiedecoded?.purposes?.a ?? cc_statistics;
        cc_marketing = cookiedecoded?.purposes?.m ?? cc_marketing;
      } catch (e) {
        // Handle any errors that might occur
      }
    }
    
      cc_statistics = customerPrivacyStatus.analyticsProcessingAllowed;
      cc_marketing = customerPrivacyStatus.marketingAllowed;
    
    
    // Load Google Tag
    window.dataLayer = window.dataLayer || [];
    function gtag(){dataLayer.push(arguments);}
    gtag('js', new Date());
    gtag('config', GOOGLE_ADS_ID);
    
    const script = document.createElement('script');
    script.setAttribute('src', 'https://www.googletagmanager.com/gtag/js?id='+GOOGLE_ADS_ID);
    script.setAttribute('async', '');
    document.head.appendChild(script);
    
    
     gtag('consent', 'update', {
     'ad_storage': cc_marketing ? 'granted' : 'denied',
     'ad_user_data': cc_marketing ? 'granted' : 'denied',
     'ad_personalization': cc_marketing ? 'granted' : 'denied',
     'analytics_storage': cc_statistics ? 'granted' : 'denied'
     });
    
    
    
    
    const createLineItemsData = (lineItems, ID_TYPE, REMARKETING_COUNTRY_CODE) => {
      return lineItems.map((item) => {
        let itemId;
        if (ID_TYPE === "shopify") {
          itemId = "shopify_" + REMARKETING_COUNTRY_CODE + "_" + item.variant?.product?.id + "_" + item.variant?.id;
        } else if (ID_TYPE === "parent_id" ) {
          itemId = item.variant?.product?.id;
        } else if (ID_TYPE === "sku" ) {
          itemId = item.variant?.sku;
        } else {
          itemId = item.variant?.id;
        }
    
        return {
          id: itemId
        };
      });
    };
    
    // testing thedata: JSON.stringify(event.data, null, 2),
    
    analytics.subscribe("checkout_completed", (event) => {
        const lineItemsData = createLineItemsData(event.data?.checkout?.lineItems, ID_TYPE, REMARKETING_COUNTRY_CODE);
        gtag('event', 'purchase', {
            send_to: GOOGLE_ADS_ID,
            value: event.data?.checkout?.totalPrice?.amount,
            currency: event.data?.checkout?.currencyCode,
            google_business_vertical: 'retail',
            items: lineItemsData 
          });
    });
    
    
    analytics.subscribe("product_added_to_cart", (event) => {
      let itemId;
      if (ID_TYPE === "shopify") {
        itemId = "shopify_" + REMARKETING_COUNTRY_CODE + "_" + event.data?.cartLine?.merchandise?.product?.id + "_" + event.data?.cartLine?.merchandise?.id;
      } else if (ID_TYPE === "parent_id" ) {
        itemId = event.data?.cartLine?.merchandise?.product?.id;
      } else if (ID_TYPE === "sku" ) {
        itemId = event.data?.cartLine?.merchandise?.sku;
      } else {
        itemId = event.data?.cartLine?.merchandise?.id;
      }
      gtag('event', 'add_to_cart', {
        send_to: GOOGLE_ADS_ID,
        items: [{id: itemId,google_business_vertical: 'retail'}],
        value: event.data?.cartLine?.merchandise?.price?.amount,
      });
    });
    
    analytics.subscribe("product_viewed", (event) => {
      let itemId;
      if (ID_TYPE === "shopify") {
        itemId = "shopify_" + REMARKETING_COUNTRY_CODE + "_" + event.data?.productVariant?.product?.id + "_" + event.data?.productVariant?.id;
      } else if (ID_TYPE === "parent_id" ) {
        itemId = event.data?.productVariant?.product?.id;
      } else if (ID_TYPE === "sku" ) {
        itemId = event.data?.productVariant?.sku;
      } else {
        itemId = event.data?.productVariant?.id;
      }
      gtag('event', 'view_item', {
        send_to: GOOGLE_ADS_ID,
        items: [{id: itemId,google_business_vertical: 'retail'}],
        value: event.data?.productVariant?.price?.amount,
      });
    });
    
    analytics.subscribe("search_submitted", (event) => {
      gtag('event', 'view_search_results', {
        send_to: GOOGLE_ADS_ID,
        query: event.data?.searchResult?.query,
      });
    });
    
    analytics.subscribe("collection_viewed", (event) => {
      gtag('event', 'view_item_list', {
        send_to: GOOGLE_ADS_ID,
        collection_id: event.data?.collection?.id,
        collection_title: event.data?.collection?.title,
      });
    });
    
    // End - ProfitMetircs - Google Ads Remarketing

11. Remove all existing text in the Code field and paste the script into the Code field. Remember to complete Step 1, Step 2 and Step 3.
    
    
    
    
12. Click "Save"
    
    
    
    
13. Click "Connect"
    
    
    
    
    
14. Click "Connect" again