1. Connections from pages with meager substance. Google debases pages and sites with almost no substance, and clearly, interfaces from these kinds of sites convey little monthly seo esteem.
2. Sites that don't offer some benefit to clients. The best precedents in this class are social bookmarking sites, registries and article indexes. These can be utilized just with the end goal of SEO, and Google doesn't give them a great deal of credit. What's much more dreadful is that, when you've presented your connection to any of these sites, it's practically difficult to evacuate it.
3. Remark spam. No one prefers spam and neither googles. In case you're posting malicious remarks everywhere throughout the web, you'll lose your site's notoriety, and you may likewise lose your rankings in web crawlers. Indeed, even nofollow remarks can be suspicious on the off chance that you misuse them.