Predicting why organic traffic has declined year over year or month over month can be quite challenging, but it doesn’t have to be.
I have seen many companies (and some SEOs) correlate a drop in traffic with the date of a known algorithm update and assume that the site was hit by Penguin, Panda or Hummingbird, for instance.
But this is often not the case; there are many other reasons why organic traffic can decrease over time.
