According to Seo tactics and strategy, if you found any link suspicious or do not want to share your web page rank to another page so add
nofollow rel attribute with that external link. In WordPress, by default all external link will be
dofollow, so to make it
nofollow you need to use plugin to extend or add this feature. Let's see.
- Go to Plugins > Add new and search WP External Links.
Install and activate this plugin in your WordPress.
- After installed this one plugin, go to Settings > External links.
- Copy the below settings, same as we done on our side OR you can setup your own setting as per requirement.
- This plugin keeps the ability to add external icon with every external link.
Hopefully, this topic will help to convert your dofollow link to nofollow, if you do not know differ among nofollow and dollow so you may read What is nofollow and dofollow rel attributes