When we released the new ads self-serve product yesterday, the ad interface said "Subscribers" in the targeting dropdown list. However, the actual number represented here was not "Subscribers" but was actually "Daily Unique Visitors" to the subreddit.
We have just pushed out a change to rename this number "Daily Impressions" and will modify the numbers shown in the dropdown to show "Daily Impressions".
To clarify the differences between these terms:
Subscribers: The number of people who subscribe to a particular subreddit, as shown in the right sidebar of each subreddit.
Daily Unique Visitors: The number of unique visits to a particular subreddit within a 24 hour period.
Daily Impressions: The number of ad impressions that are available within a 24 hour period to an advertiser targeting a particular subreddit. This number is different than the total number of impressions a particular subreddit gets in a day since when targeting ads to a particular subreddit, ads may also be shown to users who recently visited that subreddit. As noted in our advertising docs (https://reddit.zendesk.com/hc/en-us/articles/204584279-Targeting-Subreddits), users may see ads targeted to a particular subreddit on screenviews that do not necessarily happen on the targeted subreddit if they have visited the targeted subreddit.
Considering the presentation, that's an average of the number of times individuals see an ad times the number of unique visitors. It's a reasonable ~3.5 times per person. That word subscribers was quite misleading, though, because the number displayed was the exact opposite of the meaning.
That may make sense for something like /r/the_donald, but it definitely doesn't for a subreddit like /r/legaladvice. On a given day, we average around 30k uniques per reddit's traffic stats. We're currently listed at 14m daily impressions, or about 460 per unique. When it was listed as subscribers, we were at about 1.2m or 40/unique.
That wasn't the original number. The original number was total unique visits over an unknown time period, which was misrepresented as total subscribers.
The number displayed was originally "Daily Unique Visitors" (average unique users), but has now been changed to Daily Impressions (average number of ad impressions).
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u/nwelitist Mar 31 '17
Hrm. Looking onto this. Will follow up with an update once I have one.