(not set) is a placeholder name that Analytics uses when it hasn't received any information for the dimension you have selected. The reasons for (not set) appearing as a dimension value vary according to the report.In this article:
If (not set) appears in your Google Ads reports, it means that the website or app you're tracking in the Analytics account is receiving traffic from a Google Ads account that is not linked to the reporting view. You should review the following:
- Auto-tagging is on but cost data is not applied (See: Missing Data in Google Ads Reports)
- There is a redirect in the URL
gclidparameter is altered or dropped from the ad (See: CPC Data Not Collected)
- Manually tagged URLs are missing a parameter
Occasionally, information related to a click can be lost even if auto-tagging is enabled. As a result, you may see some (not set) entries instead of keyword, ad-content, or campaign information that could not be collected.
Matched Search Query
If (not set) appears in your Google Ads > Matched Search Query reports, it is likely that everything in the Google Ads section is (not set) as outlined in the above section. However, if the regular Google Ads reports (Campaigns & Keywords) are reporting data correctly, there are other reasons why (not set) may appear in the Matched Search Query report:
- Google Display Network traffic (this traffic does not have an associated query, so will show as (not set))
- Manually tagged campaigns (this report only works for auto-tagged traffic)
- Invalid clicks will show up as (not set)
- In the Google Ads search-terms report, all terms classified as "(other search terms)" will be reported as (not set).
Site Content > Landing Pages
If you see (not set) as a value for Landing Page, this is generally due to a session with no page or screen view level hits included.
It’s possible to have a session that doesn’t include a page or a screen view, but that does include another kind of interaction hit type (e.g. an events or ecommerce hit type). To see a few examples of sessions with different kinds of hit type, read about the difference between Entrances and Sessions.
To identify which hit type is causing the issue, use the advanced filter (found at the top of the data table) to restrict the data to include page/screen views matching exactly 0 in the following reports: Behavior > Events, Acquisition > Social > Plugins, and Conversions > Ecommerce.
In most cases, the cause is either a view filter that removes specific page/screen views, or the omission of page view tracking on web pages or the omission of screen view tracking on Android or iOS apps.
Technology > Browser & OS > Screen Resolution
It is common for the screen resolution that has the highest ecommerce conversion rate to show (not set). Additionally, a high incidence of (not set) ecommerce rates can occur for these dimensions:
- Flash Version (occurs if Flash is disabled in web browser settings)
- Screen Color
- Language (in demographics report)
Generally, these traffic segments are small and not statistically significant.
Custom-parameter reporting in Google Analytics 4 properties and in Google Analytics for Firebase
During the first 24 hours after you register custom parameters for an event, you may see (not set) appear as a parameter value. Once that initial 24-hour period has passed, you will see the expected parameter values from that point forward.
When you select a traffic-source related dimension (e.g. Campaign) in a Custom Report, the dimension is applied to all sessions in the account, not just paid search (often referred to as CPC) traffic. Therefore, sessions that do not have any campaign information associated (e.g., direct, referral traffic) will be reported under (not set). You will see something similar if you select the All Campaigns report under Acquisition rather than the Campaigns report under Acquisition > Google Ads.
Instead of creating a Custom Report, the best way to get this information is to use an advanced segment in the specific report.
Similar to the custom reports, when you select a dimension like Campaign in the Visitor Flow, you may see (not set) in the Funnel path because all sessions from direct and referral traffic would not have campaign information. Notice that (all other campaigns sources) + (not set) = Total Sessions.