Como adicionar o Meta Pixel Code no seu website

<script>
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        {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
            n.callMethod.apply(n,arguments):n.queue.push(arguments)};
            if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
            n.queue=[];t=b.createElement(e);t.async=!0;
            t.src=v;s=b.getElementsByTagName(e)[0];
            s.parentNode.insertBefore(t,s)}(window, document,'script',
            'https://connect.facebook.net/en_US/fbevents.js');
        fbq('init', 'xxxxxxxxxxxx');
        fbq('track', 'PageView');
    </script>
    <noscript><img height="1" width="1" style="display:none"
                   src="https://www.facebook.com/tr?id=xxxxxxxxxxxx&ev=PageView&noscript=1"
        /></noscript>
    <!-- End Meta Pixel Code -->
</head>

<script> !function(f,b,e,v,n,t,s) {if(f.fbq)return;n=f.fbq=function(){n.callMethod? n.callMethod.apply(n,arguments):n.queue.push(arguments)}; if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0'; n.queue=[];t=b.createElement(e);t.async=!0; t.src=v;s=b.getElementsByTagName(e)[0]; s.parentNode.insertBefore(t,s)}(window, document,'script', 'https://connect.facebook.net/en_US/fbevents.js'); fbq('init', 'xxxxxxxxxxxx'); fbq('track', 'PageView'); </script> <noscript><img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=xxxxxxxxxxxx&ev=PageView&noscript=1" /></noscript> <!-- End Meta Pixel Code --> </head>