Backlink for Tumblr Blog site

Avg Bid (USD)
Project Budget (USD)
$10 - $30

Project Description:
I have one project for tumbler. I need to find out how they make the backlinks for the following tumblr site ,and which SEO software tool they use to builk backlink for the following sites:

I look forward to your soonest reply.

Skills required:
Internet Marketing, Link Building, Marketing, SEO
About the employer:
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