### Set Custom Dimension using `analytics.js`
* Include the analytics tag:
```javascript
<!-- Google Analytics -->
<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','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-144782955-1', 'auto');
ga('send', 'pageview');
</script>
<!-- End Google Analytics -->
```
* Replace the `UA` code with the `UA tarcking ID` of your analytics account
* Make sure to have already created the custom dimension in [google analytics](https://support.google.com/tagmanager/answer/6164990?hl=en)
* If you send your data **after** the page load, make sure to use the event way of sending data:
```
ga('set', 'dimension1', 'analytics-set');
ga('send', 'event', 'category', 'action', {
'dimension1': 'analytics-set'
});
```
* Otherwise, the `send` declared in the above script tag will be enough to send the data to GA