Nowadays everyone has a Facebook account. So it will be easier for the website viewers to comment on the posts if there is a Facebook Comment Page plugin like below.

Follow these steps carefully
>>>Step 1<<<
1. Go to Settings > Template > Edit HTML

2. Click anywhere inside the code section and type "CTRL + F" and search for </body>
3. Just above </body> insert (copy and paste) the following code
<div id="fb-root"></div>4. Then click on "Save Template"
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.3";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
>>>Step 2<<<
1. Now search for <b:include data='post' name='post'/>
2. Just below <b:include data='post' name='post'/> insert (copy and paste) the following code
<b:if cond='data:blog.pageType == "item"'>Note -
<div
class="fb-comments"
data-href="<data:post.url/>"
data-width="600"
data-num-posts="100">
</div>
</b:if>
- Change the values of width to your choice i.e. what suits best for your site.