Pages that allow comments are the bread and butter of link building. Finding pages that allow comments and have relevant content can be very time consuming, unless you know how to search for them.
Here the Google search syntax (remove the brackets for actual results).
[keyword] site:.edu inurl:blog “post a comment” -“you must be logged in”
To learn more about how you can use this and similar techniques to improve the search engine ranking of your website, talk to a professional digital marketer at a New York SEO Company like Digimix.