I`ve noticed some drastic changes in ranking.

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

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  Joy Edward: Hiii Community.. I've a question for you all....
  
  Recently, I've noticed some drastic changes in ranking. I think there is an algorithm update.. but i can't understand what is going on behind it. Let me explain what I've noticed...
  When we search for a keyword like "SEO Company Rochester", Google shows results related to seo services, even highlighting the "service" keyword for this particular query. Whereas earlier, Google highlights the all keywords that were used in query. And as i know "Service" is not a LSI keyword of "company", then why Google used it. Please share your reviews.. I want to hear from you guys..
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  Brent Wildman: First of all, Google is constantly, almost daily, rolling out updates to their algorithm.
  
  Secondly, Google is getting smarter and in turn is making associations with different queries. According to Google, if someone is looking for a "SEO Company" chances are they are looking for "SEO Services" as well. Or after searching for one they search for the other. What you're probably seeing is "Hummingbird" in action, although this has been happening for a while.
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  Majinthan Satkunananthan: Yes, Google has updated the "humming bird". It is considering Keywords and Low Quality Content. Check the following link ;http://searchengineland.com/google-hummingbird-172816 and check your back in status in "ahrefs" or any other tools. ;
  Now the next problem is unnatural backlink so you find those links and remove.