I have multiple sites on the same server, all in different niches and all drastically different in how frequently content is updated, backlinks, interlinked (some not, some slightly), etc..
On Tuesday I noticed on my primary site I had dropped a couple positions on a few keywords which I attributed the loss in traffic to that reason alone. However I noticed yesterday that not only that site, but all other sites have proportionally less traffic.
Now, the very interesting thing about this is keywords I rank #1 for across these sites, have received 25% fewer traffic too. So for a keyword that gets an average of 190 visitors on a Wednesday, got 130 yesterday (Wednesday). And I'm fairly certain it has been steady at #1 all day yesterday and Tuesday.
I talked to my host, no outages were reported. Checked analytics hourly traffic view, no signs of downtime.
The only thing I can think of is:
(A) Google has placed a penalty on every single one of my sites (which would be really peculiar)
(B) Something else I haven't yet thought of!
Very irritating. Anything similar happen to others?