How to identify relevant sites?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  happysus sait: Link building is very critical process because of penguin need relevant site. How to identify  ;relevant site? ;
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  Joeri Minnekeer: There are multiple factors to identify a relevant site for link building. Personally I use the MOZbar extension. You can easily identify thinks like Page authority, social media likes etc... ;
  
  http://moz.com/tools/seo-toolbar
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  happysus sait: Mozbar is to see PA and DA. Relevant site for me is relevant based on keyword.
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  Joeri Minnekeer: The way I identify a relevant site is:
  
  1) Type the keyword in ;http://www.semrush.com/ and check the top pages.
  
  2) Check the top 5 sites with MOZbar
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  Edwin Jonk: From the expert panel in this weeks SEO Questions hangout on air on 01:40:52 into the YouTube video: https://dumbseoquestions.com/q/how_to_identify_relevant_sites +happysus sait
  
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