stupid question about url redirects

i am getting traffic from many domains, but i want to hide it , and i want my site to see only one referring domain i want

i can redirect all my traffic to my wanted domain , then use this script
<script language="javascript">
window.location.href = "https://bestdomain.com/"
</script>

so what bestdomain.com owner will see ? what referrer ? many domains ? or only one ? (that traffic is coming from

buck question in a thread!
You should ask single question then it would possible to answer you