Hello Experts, Currently, I am doing SEO for my client's website which is health niche. I have implemented all on-page factors. My keyword has very high competition and I was analyzing my competitors backlinks. Competitors who currently ranking well in Google. Many of their backlinks come from private blog network and link exchange. I have read some post, blogs, articles on internet that these linking methods consider as unnatural link method from google. I was creatting backlinks for my website using various internet sources like DS, SB, article, blog commenting except link exchange and private blog links. But those websites are still ranking using all this stuff do you think this is fair? PLease, share your saying..