Google Algorithm Update on 30th Nov. 2018 - A Reversal of the 16th Update?

Dec 03, 2018
2 min read
Google Algorithm Update

I’ve been checking the sites hit by the latest update, and it would appear that this latest volatility is indicative of a reversal of the update I reported on in detail on the November 16th.

In the 16th November Update, I concluded that Social Media sites took a hit, with news websites seeing an increase.

I reported previously that we had two outliers, Wikipedia and YouTube. It would appear that Wikipedia has regained the visibility they lost, but YouTube did not see their improvements in the 16th update disappear. Some bias, maybe?

As this appears to be a simple reversal, I will keep this post quite short. However, I would say that the 16th update could be a sign of things to come, so you may want to read my previous post and follow some of the guidance I put there.

The SERP Trackers

SEMrush Sensor:

The SEMrush Sensor shows a clear spike on November 30th, 2018, at a similar level to November 16th.

SEMrush Sensor 2nd December 2018.

Rank Risk Index:

The Rank Risk Index tracker shows a more significant spike in volatility than the 16th.

Rank Ranger Risk Index 2 December 2018.


The MozCast weather report shows a similar spike in SERP volatility on both dates.

Mozcast 2 December 2018.

Who does the update affect?

As I mentioned at the start of this post, this update appears to be a reversal of the November 16th one.

Take a look at the winners and losers’ visibility chart for the November 16th at Searchmetrics.

Searchmetrics show News sites are winners, and social media and directory sites are losers.

Now take a look at the chart as of the December 2nd, 2018:

Searchmetrics show News sites are winners, and social media and directory sites are losers.

You can see that it is almost a full reversal of the previous update, with Social Media websites recovering some visibility, and News websites losing all if not more of their gains.

There are a few exceptions \ comments I should make:

  • While the directory site recovered, Yelp did not.
  • YouTube did not lose the gain in visibility they received from the previous update.
  • The net gains and net losses are not an identical reversal in scale.
  • A large website, SearchEngineLand, was temporarily de-indexed as Google mismarked it as being hacked. I mention this, as comments have been made on SEO forums that this was a possible cause. The visibility charts above clearly indicate it was not. However, it may account for some SERP trackers showing slightly higher volatility on this date than the 16th.

It is, therefore, possible that you may not have seen a recovery from the 16th update, and if so, you should read the advice I gave in my previous post carefully.