Quality backlinks can be great for Search-Engine-Optimisation (SEO). Backlinks from .gov and .edu websites can carry high authority. Here’s how to find .gov and .edu websites where you may be able to post a comment with a backlink to your website.
Type the following into Google replacing “Your Keyword” with a keyword relevant to your business.
For .gov websites:
site:.gov inurl:blog “post a comment” -“comments closed” -“you must be logged in” “Your Keyword”
For .edu websites:
site:.edu inurl:blog “post a comment” -“comments closed” -“you must be logged in” “Your Keyword”
I’d recommend only posting/commenting on relevant content with an appropriate message.