Google Analytics

I am signed up for google analytics for my website. Says it needs tagged to start getting data from my website. Code is below. Please get my analytics going for me.

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-KRJHHK1W5H"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());

gtag('config', 'G-KRJHHK1W5H');
</script>