Split Test for Retargeting

<script>
  function controlVariant() {
    dataLayer.push({'event': 'google'});
    return variantOne;
  }
  function testVariant() {
    dataLayer.push({'event': 'adroll'});
    return variantTwo;
  }
  
    var randomNumSample = 1073741824,
      variantOne = "google", // Variation 1 name
      variantTwo = "adroll", // Variation 2 name
      variant = variantOne;

if(!{{Split Variation Cookie}} && randomNumSample) { // If cookie isn't set run code

    if({{Random Number}} < randomNumSample) {
      variant = testVariant(); // For 50 % of hits, fire Variation 2
    }
	else if({{Random Number}} >= randomNumSample) {
	  variant = controlVariant(); // For 50 % of hits, fire Variation 1
	}	
    var d = new Date(); // Create cookie
    d.setTime(d.getTime()+1000*60*60*24*730);
    var expires = "expires="+d.toGMTString();
    document.cookie = "splitVar="+variant+"; "+expires+"; path=/";
  } 
  else if({{Split Variation Cookie}} == variantOne) { // If user has only seen Variation 1
    variant = controlVariant();
  }
  else if({{Split Variation Cookie}} == variantTwo) { // If user has only seen Variation 2
    variant = testVariant();
  }
</script>

Hi Phil,

I would like to understand your concept and logic about A/B testing for retargeting. Do you use your tag manager script for splitting retargeter audience collector pixels?

Thanks!