You might have noticed that your search results are looking a bit different lately while using Bing and Google. Here's just a few of the reasons why that is: read Why are my search results different? Changes behind the scenes to get a quick overview of Panda, Penguin, the Knowledge Graph, and other factors affecting what you see in your search results.
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Both Bing and Google use different algorithms to produce search results that’s why people are worried when they are webmasters and trying to reach upper part of the SERPs.