Most bloggers link their old articles in the new one and the new articles in the old ones. I had a question does this count for link juice in serp ranking? I have thought previously that they may use for referring to other articles. I see on moz https://moz.com/learn/seo/internal-link I have few questions, Does they can increase in serp? How about keyword Density? since they are too keywords while linking to each article. I am waiting great answers from you all.