If you are practicing internal linking, You are capturing traffic on your page for a longer time. This will lessen the bounce rate . It actually captivates the visitor. Don't keep on adding non-relevant links.

Stuffing in any way is not good. Give dofollow links.

Internal linking spread link juice all over the website. It knit a wide network that visitors and search engine bots crawl and index your pages.

A website without internal linking is weak and disconnected.

Also Read: Strategies & Tools To Find Long-Tail Keywords

Few Personal Tips :

• Use a variety of anchor text. Do not stuff them and don't use exact format or keyword.
• Interlink related articles only.
• All internal links set to opened in New Tab and dofollow.
• Use Long Tail keywords method.