After the penguin and panda update, there are lots of site getting penalized due to automated and poor backlinks. if you are one of them then here is a chance to restructure your backlink profile.
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Web 2.0 Blogs are the best when it comes to building more do follow backlinks and increase authority
When it comes to domain branding you need high-quality authority backlinks from High DA/PA sites.
Without improving your On-Page it is very hard to rank well in search engines.