As you know, we had a pretty big Google update that Google confirmed as a core update on March 12th. Around March 20th, 21st and 22nd, I saw the forum chatter spike back up a bit and the tools light up – but it wasn’t as huge as that last update and we were busy with the rel=prev/next thing.
Now that both the chatter and the rel=prev/next thing have somewhat chilled, I figured I’d document this unconfirmed March 20th through 22nd update. I suspect it is related to the March 12th roll out that can take weeks to fully roll out according to Google:
That being said, I suspect these fluctuations may be related to the March 2019 core update finalizing its roll out but who knows, it can be related to something completely different.
Here is some of the chatter from WebmasterWorld around these dates:
Here are what the tools show:
Have you noticed changes from the March 12th to the March 20, 21, 22 timeframe?
Forum discussion at WebmasterWorld.