Hello! Could you please explain to me what a mod is?
A mod is a website module/component like a form, image gallery, block of text, etc. You can build them in the cloud and then deliver to any web page with a single line of code.
You can see an example here: https://anymod.com/mod/adlbb
For that example, it could be delivered to a web page by placing
<div id=anymod-adlbb data-load=b></div>
in the HTML, along with adding the Anymod script to the page:
<script project="855EM8" src="https://cdn.anymod.com/v1"></script>
You can see it being delivered to a page here: https://jsfiddle.net/n419ejeo/