Learn what a plugin on wordpress?

https://geniusmarketing.me/lab/azbuka-instagram-st...
If you go to the website and scroll to the them that there is a window from facebook - what is this plugin
https://s.mail.ru/JGHh/GK2hnBTX7
July 2nd 19 at 18:13
2 answers
July 2nd 19 at 18:15
If you look in the console for the item, you can see that it is:
<iframe src="//www.facebook.com/plugins/like.php?href=https%3A%2F%2Fwww.facebook.com%2FGeniusMarketing.me&layout=standard&action=like&show_faces=true&share=true&height=90&width=330&appId=473200492729081" scrolling="no" frameborder="0" style="border:none; overflow:hidden; height:90px; width: 100%;" allowtransparency="true"></iframe>

frame referencing the plugin from fb www.facebook.com/plugins/like.php
Here the details use:
https://developers.facebook.com/docs/plugins/like-... - arturo.Wilkinson commented on July 2nd 19 at 18:18
also, for WP can use one of their free plugins. Will be the same.
for example: https://cs.wordpress.org/plugins/facebook-button-p... - arturo.Wilkinson commented on July 2nd 19 at 18:21
July 2nd 19 at 18:17
Yes thank you, but how it is done with the help of the plugin that will appear on best personal Finance and etc.

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