In the past, if your SEO company has sent lots of poor quality links to your website, it may have put your website on good ranking position. However, that will hurt your SEO now due to the new algorithm that Google announced. Today, when we talk about back linking, we need to ensure that all backlinks
must be from high quality website. When we say high quality website, it mean website that has high domain authority (DA) and high page authority (PA) One high quality back link is equivalent to 100 low quality back link. When checking the link profile, we will also look into the possible irrelevant backlinks from unwanted sites. If you are under any SEO attack, people can send thousands of unwanted poor quality backlinks to your site too. You will never know until you have a thorough link analysis. As SEO consultant, he will check through and give you a breakdown of what is good and what is bad. If need be, we can submit unwanted links through Google webmaster to disavow those unwanted links.