Hi!
I hope someone can help me with the following case:
Last year my Publisher Coverage was 83% from may 1 to september 23.
On September 24, it went up to 99% and continued this average until December 22 (3 months).
The day after, the Publisher Coverage dropped to an average of 86% and remains there to this day.
I have done a lot of improvements on my site in December and also switched my account from Individual to Business.
The big question is what caused the drop? The site improvements? The switch to Business account? End of Christmas drop? Something else?