Thanks a lot for the info, Joseph and Nuria.

These "none" referrers are problematic for all the analytics teams out there, it seems. When searching about around the issue of "none" referrers, I found that it even drove Groupon to conduct an iffy experiment: they "deindexed" themselves from Google for about 6 hours, finding that "Up To 60% Of “Direct” [i.e., referrer '-'] Traffic Is Actually Organic Search"...
https://searchengineland.com/60-direct-traffic-actually-seo-195415

Bob

On Tue, Jun 9, 2020 at 4:29 PM Nuria Ruiz <nruiz@wikimedia.org> wrote:
Hello, 

See https://phabricator.wikimedia.org/T195880 for info on "none" referrers.

Thanks,

Nuria

On Tue, Jun 9, 2020 at 6:10 AM Joseph Allemandou <jallemandou@wikimedia.org> wrote:
Hi Robert

From the `WHERE` clause here:
you can see that we bundloe altogether desktop, mobile-web and mobile-app rows.

As for the reason of so many empty referrers, I don't know myself, but I know it's been a topic already discussed.
IIRC Nuria and Jon Katz looked into it a bit, and more recently Isaac Johnson (all in direct copy).

Cheers
Joseph

On Tue, Jun 9, 2020 at 9:03 AM Robert West <west@cs.stanford.edu> wrote:
Hi Analytics team,

Quick question:
Does the Clickstream data lump together mobile and desktop?
It seems to be hinted at here, but it's not mentioned explicitly. It just says that the 2015 data is for desktop only, which seems to imply that after that it's desktop + mobile.

Also, I was wondering if anyone has any insights into what might cause referrers to be empty? I tried googling, but the issue is clouded in mystery and seems to depend a lot on browser and website specificities. Any insights (small or big) would be appreciated!

Thanks a lot!
Bob
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Joseph Allemandou (joal) (he / him)
Sr Data Engineer
Wikimedia Foundation
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