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Carlos,

I'm not sure how every search engine handles it but google definitely tracks the root domain.  So to answer your question, links from different blogs or root domains would count more than multiple links from the same root domain.

-Nick

Hi Carlos,

The best backlinks come from High Domain Authority sources with relevant content.  So if you sell watches, backlinks from a reputable watch company or blog with high DA would be best but links from a car company would mean less.  Basically you want the backlinks with the highest DA and relevant anchor text/content.  Multiple sources also mean more than multiple links from a single source.  While both are helpful, links from multiple sources is a signal to google and other engines that you're the talk of the town.

Best of luck,

-Nick

Hi Armin666,

I don't think it's a big deal as far as SEO goes but it's confusing to users and it will make it harder for you to track your most popular content.  You'll have the same content tracked differently depending on which dynamic page users happen to land on.  I suggest checking out a plugin to suppress that behavior or limit it.  YOAST has some pretty good wordpress specific SEO suggestions.

Best of Luck,

-Nick

I have a network security company http://NBGnetworks.com  I've searched high and low on google adwords and with ubersuggest but I can't seem to find any keywords that have traffic and aren't medium or harder.  In-fact I've found hundreds of keywords that have no searches at all and are still listed as medium by MOZ.  Can any fellow MOZers help me?!

Thanks,

-Nick