Google is not only hiding half of their own keyword referral data, but they are hiding so much more than half that even when you mix in Bing and Yahoo! you still get over 50% of the total hidden.
Google’s 86% of the 26,233 searches are 22,560 searches.
Keyword (not provided) being shown for 13,413 is 59% of 22,560. That means Google is hiding at least 59% of the keyword data for organic search. While they are passing a significant share of mobile search referrers, there is still a decent chunk that is not accounted for in the change this past week.
Not passing keywords is just another way for Google to increase the perceived risk & friction of SEO, while making SEO seem less necessary, which has been part of “the plan” for years now.
Buy AdWords ads and the data gets sent. Rank organically and most the data is hidden.
When one digs into keyword referral data & ad blocking, there is a bad odor emitting from the GooglePlex.