WP site brand not showing in FB posts…

Hi, when i post on facebook the image shown is a wordpress logo or two random images- not the brand from my website..

I was advised to post some code in the asme place as google analytics tracking code and still no change…

I am hoping someone has had this problem and know a 2 second fix- been driving me nuts for days…

Code is this for both GA and image call up….

<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  ga('create', 'UA-41119714-1', 'auto');
  ga('send', 'pageview');

<script type="application/ld+json">
? ? {
? ? ? "@context": "https://schema.org",
? ? ? "@type": “Luke Woods Photo”,
? ? ? "url": "https://www.luke-woods.com",
? ? ? "logo": "https://luke-woods.com/wp-content/uploads/2014/12/lwp32.png"
? ? }

</script>

? ?
<script type="application/ld+json">
? ? {
? ? ? "@context": "https://schema.org",
? ? ? "@type": “Luke Woods Photo”,
? ? ? "url": "https://www.luke-woods.com",
? ? ? "logo": "https://luke-woods.com/wp-content/uploads/2014/12/lwp32.png"
? ? }
? ? </script>

Thanks in advance. Luke