Data from Google’s March Core Update

I tracked the traffic data for 16,573 sites during the rollout of Google’s March Core Update (which concluded on April 19th).

All tracked websites are monetized with Mediavine or Raptive ads.

Traffic data is from Ahrefs, and is only an estimate.

Here are my findings:

Data for all tracked websites:

Total Number of Sites	16,573
Total Traffic March 5th	1,155,303,646
Total Traffic April 19th	960,965,873
Total Traffic Loss	194,337,773
Avg. Loss per Site	11,726
Avg. % Loss per Site	17%

Data for all tracked websites with less than 10,000 monthly visitors:

Total Number of Sites	11,593
Total Traffic March 5th	68,318,157
Total Traffic April 19th	24,757,805
Total Traffic Loss	43,560,352
Avg. Loss per Site	3,757
Avg. % Loss per Site	64%

Data for all tracked websites with traffic between 10,000/mo and 50,000/mo:

Total Number of Sites	3,211
Total Traffic March 5th	106,523,326
Total Traffic April 19th	74,594,898
Total Traffic Loss	31,928,428
Avg. Loss per Site	9,943
Avg. % Loss per Site	30%

Data for all tracked websites with traffic between 50,000/mo and 1,000,000/mo:

Total Number of Sites	1,645
Total Traffic March 5th	377,098,219
Total Traffic April 19th	309,732,863
Total Traffic Loss	67,365,356
Avg. Loss per Site	40,952
Avg. % Loss per Site	18%

Data for all tracked websites with over 1,000,000 monthly visitors:

Total Number of Sites	124
Total Traffic March 5th	603,363,944
Total Traffic April 19th	551,880,307
Total Traffic Loss	51,483,637
Avg. Loss per Site	415,191
Avg. % Loss per Site	9%

27% of all tracked sites saw traffic increases (greater than 0%), which leaves 73% with traffic losses.

Here are the raw numbers:

Total Tracked Websites	16,573
Websites with Traffic Increases	4,483 (27.05% of total)
Websites with Traffic Decreases	12,090 (72.95% of total)

The complete data set is available to members of Website Growth Mastermind.

Please note: Site Stats Database does not yet include post-March Core Update traffic data.

If you have any questions, you can reach me on Twitter/X or leave a reply below.

– Ian, founder of Site Stats Database