First of all, 20 domains different sites on 20 different domains is quite a lot. Like, really a lot. So why would you want to link them all together? See Matt Cutts’ video response here:
First of all, 20 domains different sites on 20 different domains is quite a lot. Like, really a lot. So why would you want to link them all together? See Matt Cutts’ video response here:
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