Backlinks are not harmful, but are an essential part of Google ranking factors. They must be based on useful and high-quality domains, however, and not on spun content or purchased backlinks. Contextual links are the most ideal. Guest blogging, generating long, relevant posts, and networking with relevant bloggers continue to be paramount to effective backlinks.
Bounce rate directly affects rankings. It refers to the percentage of readers who hit the back button after landing on your website. Decreasing the bounce rate increases the quality of the website to search engines. Read more on this article: http://bit.ly/2mlFmKx