Purpose of recent comments is to be able or to find out who had just commented, and this plugin displays a list of the most recent comments to your blog in a highly customisable way.
Now follow this tutorial to make a recent comments widget:
1. Log in to your Blogger account
2. Navigate to Layout > Page Elements > Add a Gadget
3. Click on HTML/Javascript
copy and paste this code:
<script style="text/javascript" src="http://sites.google.com/site/jayceoyesta/jayce-o-design-studio/recents.comments.js"></script>
<script style="text/javascript">
var numcomments = 8;
var showcommentdate = true;
var showposttitle = true;
var numchars = 100;
var standardstyling = true;
</script>
<script src="http://jayce-o.blogspot.com/feeds/comments/default?alt=json-in-script&callback=showrecentcomments"></script>
4. Replace http://jayce-o.blogspot.com with your own Blog address.
var numcomments = 8 is the number of total comments to display, You can customize this value according to your needs
5. Save your widget and you are done. (as easy as that)