What is the importance of Outbound Link Theme in SEO factor?
Search engines not only consider the outbound links but also assess outbound link theme to increase the relevancy signal of the webpage. When the outbound link of the page you point has a different theme, then it is going to spoil the page ranking of the website.
For example, If you are having a webpage about planes and you
point an outbound link to some other mathematical geometry related
pages, then Google may consider the page about the shape plane and not
the about the airplane.