Most powerful for getting a contextual do-follow backlink is the Web 2.0 blog. An expert knows 2.0 blogs have high authority and weight. Google considers them as highly important sources and crawls these websites fast.
These blogs get a lot of traffic so you can expect a high volume of traffic to your site/Business. Practically, these links will be loved by Google. Because Google always loves contextual backlinks, and if they are niche related you know you going to get rank.
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