Adding Google Publisher Tag to my website

Hello,

I am trying to run ads on my website with a company. They have provided the following code:

Header

<!-- Start GPT Tag -->
<script async src='https://securepubads.g.doubleclick.net/tag/js/gpt.js'></script>
<script>
  window.googletag = window.googletag || {cmd: []};
  googletag.cmd.push(function() {
    var mapping1 = googletag.sizeMapping()
                            .addSize([1024, 0], [[728, 90]])
                            .addSize([640, 0], [[320, 50]])
                            .addSize([0, 0], [[320, 50]])
                            .build();

    googletag.defineSlot('/22491887924/iafrika.org/generic', [[728,90],[320,50]], 'div-gpt-ad-8601431-1')
             .setTargeting('pos', ['L_Top'])
             .defineSizeMapping(mapping1)
             .addService(googletag.pubads());
    googletag.defineSlot('/22491887924/iafrika.org/generic', [[300,250]], 'div-gpt-ad-8601431-2')
             .setTargeting('pos', ['MPU_Mid'])
             .addService(googletag.pubads());
    googletag.defineSlot('/22491887924/iafrika.org/generic', [[728,90],[320,50]], 'div-gpt-ad-8601431-3')
             .setTargeting('pos', ['L_Bot'])
             .defineSizeMapping(mapping1)
             .addService(googletag.pubads());

    googletag.pubads().enableSingleRequest();
    googletag.pubads().collapseEmptyDivs();
    googletag.enableServices();
  });
</script>
<!-- End GPT Tag -->

Body

<!-- GPT AdSlot 1 for Ad unit 'iafrika.org/generic' ### Size: [[728,90],[320,50]] -->
<div id='div-gpt-ad-8601431-1'>
  <script>
    googletag.cmd.push(function() { googletag.display('div-gpt-ad-8601431-1'); });
  </script>
</div>
<!-- End AdSlot 1 -->

<!-- GPT AdSlot 2 for Ad unit 'iafrika.org/generic' ### Size: [[300,250]] -->
<div id='div-gpt-ad-8601431-2'>
  <script>
    googletag.cmd.push(function() { googletag.display('div-gpt-ad-8601431-2'); });
  </script>
</div>
<!-- End AdSlot 2 -->

<!-- GPT AdSlot 3 for Ad unit 'iafrika.org/generic' ### Size: [[728,90],[320,50]] -->
<div id='div-gpt-ad-8601431-2'>
  <script>
    googletag.cmd.push(function() { googletag.display('div-gpt-ad-8601431-2'); });
  </script>
</div>
<!-- End AdSlot 3 -->

for me to add but I'm not sure:

• What the best what to do it is with Generate Press Premium
• If there is anything else I need to consider

I have looked in the forum but couldn't see anything similar. Please let me know.

Thanks,

Grant