Aleyda Solis posted the results of a poll she ran, which showed 54% say their sites have seen mostly a positive effect from Google Updates in the last couple of years. John Mueller from Google replied to that poll saying, "While there are exceptions, life as an SEO or when working on the web is not about doom & gloom."...
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SEO Poll: 54% Of SEOs Saw Positive Effects From Google Updates
seroundtable.com