Google's August 1st Core Update: Week 1

On August 1, Google (via Danny Sullivan's @searchliaison account) announced that they released a "broad core algorithm update." Algorithm trackers and webmaster chatter confirmed multiple days of heavy ranking flux, including our own MozCast system:
Temperatures topped on August 1-2 (both around 114°F), with a 4-day time of maintained rankings transition (purple bars are all more than 100°F). While this has settled to some degree, yesterday's information recommends that we may not be finished.

August second set a 2018 record for MozCast at 114.4°F. Remember that, while MozCast was initially tuned to a normal temperature of 70°F, 2017-2018 normal temperatures have been considerably higher (more like 90° of every 2018).

Temperatures by Vertical
There's been speculation that this algo update targeted so called YMYL queries (Your Money or Your Life) and disproportionately impacted health and wellness sites. MozCast is broken up into 20 keyword categories (roughly corresponding to Google Ads categories). Here are the August 2nd temperatures by category:


At first look, the "Wellbeing" classification appears to be the most affected. Watchwords in that class had an every day normal temperature of 124°F. Note, however, that all classes indicated temperatures more than 100°F on August first – this isn't where one classification was impacted and the rest were left immaculate. It's likewise imperative to take note of that this example moved amid the other three long stretches of substantial motion, with different classifications demonstrating higher normal temperatures. The multi-day refresh affected an extensive variety of verticals.

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