You can configure all external links with custom settings globally in your WordPress site. For example: If you want to open all external links in a new tab then you can configure WordPress to open all external links in a new tab so that you don’t need giving blank target everytime you add an external link inside your blog post or anywhere else.
Twitter, Google, Blogger, Youtube, Facebook most of the famous networks excluding Hacker News makes external links to open with a blank target. Opening link with target blank means the link open on a new tab of your browser. This leaves your page open and increases time on site so if you are tired of checking box of ‘open link in new tab‘ or setting up target blank for each external link you add on your WordPress site then here is a solution for you.