Hello
The outbound link is also known as an external link, it refers to hyperlinks that point to any domain other than the source domain where the link exists. This means that if you click on the outbound link it will take you to another specific webpage or website.
A recent SEO study by Reboot shows that outbound linking is a powerful on-page SEO technology and has a positive effect on SEO. When you offer good content with good and relevant external linking, Google treats your site as a good source of information.
Hope it helps you