"While I was offline, it seems the chatter within the SEO industry spiked around the topic of search ranking volatility. It is harder to confirm the volatility, now with the tools recalibrating, but it does seem something started around Tuesday, October 7th, into the 8th. We are due a core update and I suspect Google will announce one in the coming weeks but what we are seeing with this volatility would not be related to a core update."
"I don't think this is related to the confirmed Google Search serving bug but who knows... That being said, there is a nice amount of chatter on WebmasterWorld and on this site - here is some of that chatter: SEO Chatter Whatever they did last week, it is a step back to useless traffic. We had 4 good days without bots and good Google traffic. Now it is bots and useless traffic. Especially in the night, from noon till 1am, bots are 100% traffic."
Search ranking volatility spiked around October 7–8 while tracking tools recalibrated, making objective confirmation harder. A core update is due, but observed volatility appears unrelated to a core update. The confirmed Google Search serving bug seems unlikely to explain current movements. Forum and webmaster reports describe sudden surges of bot traffic, large volumes of visits from irrelevant countries, and nighttime bot dominance. Numerous sites reported dramatic traffic drops, index and discovery problems, older content surfacing, and missing expected visits despite stable rankings. Tracking tools are still adjusting, complicating correlation and root-cause analysis.
Read at Search Engine Roundtable
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