Integrate using the Engage SDK script and Google Tag Manager

<script>
    // Initialize the engage variable
    var engage = undefined;

    // Create and inject the <script> tag into the HTML
    var s = document.createElement("script");
    s.type = "text/javascript";
    s.async = true;
    s.src = "https://d1mj578wat5n4o.cloudfront.net/sitecore-engage-v.1.4.3.min.js";
    var x = document.querySelector("script");
    x.parentNode.insertBefore(s, x);

    // Initialize the Engage SDK
    s.addEventListener("load", function () {
      var settings = {
        clientKey: "<client_key_PLACEHOLDER>",
        targetURL: "<stream_api_target_endpoint_PLACEHOLDER>",
        pointOfSale: "<point_of_sale_PLACEHOLDER>",
        cookieDomain: "<cookie_domain_PLACEHOLDER>",
        cookieExpiryDays: 365,
        forceServerCookieMode: false,
        includeUTMParameters: true,
        webPersonalization: true /* boolean or object. See Settings object for all options. Default: false */
    };

    window.Engage.init(settings).then(function (result) {
      engage = result;

      // Send a VIEW event
      var event = {
        channel: "<channel_PLACEHOLDER>",
        language: "<language_PLACEHOLDER>",
        currency: "<currency_PLACEHOLDER>",
        page: "{{Page Path}}"
      };
     engage.pageView(event);
    });
  });
</script>