Change JetPack Related Posts NoFollow to DoFollow

Jetpack Related Posts use nofollow for two main reasons:

1. On WordPress.com, we track clicks on the Related Posts so that we can improve the algorithm used to find related posts. By using nofollow, we prevent crawlers from affecting the algorithm.
2. We also use nofollow to dissociate the related posts from the current page. Since Related Posts are automatically generated, the nofollow should prevent the module links from affecting SEO on either page. We try to make sure that the module doesn’t hurt your SEO, just in case unrelated posts would appear in the module.

To change this, you can add the following to your functions.php file or (preferably) a functionality plugin on your site:

function jeherve_custom_rp_rel( $post_id ) {
    return '';
}
add_filter( 'jetpack_relatedposts_filter_post_link_rel', 'jeherve_custom_rp_rel', 20, 2 );

I hope that helps!

Should i also remove or nofollow the popular post widget from sidebar? Because they are also unrelated and automatically generated.
and from where i can download functionality plugin. I can’t found that plugin here.

Should i also remove or nofollow the popular post widget from sidebar?

That’s a good question! If you are removing the nofollow from your Related Posts, then I don’t think you need to worry about making your Popular Posts widget links nofollow.

and from where i can download functionality plugin. I can’t found that plugin here.

You’ll need to either create the plugin yourself, or use an existing functionality plugin. I’ve used this one myself in the past:
https://www.ads-software.com/plugins/functionality/

Please let me know if that clears things up!

@ryan Cowles check this Google: Nofollow Unnecessary For Related Post Blog Links

@b_dark Thanks for that link!

We’ll consider changing the default in a future Jetpack release. You can follow our progress here:
https://github.com/Automattic/jetpack/issues/3366