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Any social bookmarks safe for manual Tier 1?

Discussion in 'White Hat SEO' started by slipring, Mar 13, 2015.

  1. slipring

    slipring Registered Member

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    I was wondering if the top 20 social bookmarking sites were safe for tier 1 or should they only be used for tier 2 and 3. What should I be using for tier 1?

    Thanks