Adobe uses several different methods to identify visitors on your site. The visitorID variable overrides all other methods of visitor identification.

Adobe advises against using this variable. Use the Adobe Experience Cloud Identity Service instead.

Visitor ID using the Adobe Analytics extension

Visitor ID is a field under the Cookies accordion when configuring the Adobe Analytics extension.

  1. Log in to Adobe Experience Platform Data Collection using your AdobeID credentials.
  2. Click the desired tag property.
  3. Go to the Extensions tab, then click the Configure button under Adobe Analytics.
  4. Expand the Cookies accordion, which reveals the Visitor ID field.

Assign this field to the data element containing your custom visitor ID. Do not set this field to a static value.

s.visitorID in AppMeasurement and the Analytics extension custom code editor

The s.visitorID variable is a string that contains a custom unique identifier for the visitor. Valid values include alpha-numeric characters up to 100 bytes. Avoid using dashes, spaces, underscores, or symbols in this variable.

If you set the visitorID variable partway through a visit, data results in two separate unique visitors.
s.visitorID = "abc123";
An invalid implementation of custom visitor ID’s can lead to incorrect data and poor reporting performance. If this variable contains a default value (such as "0" or "NULL"), Adobe treats these hits as if they are the same visitor. This situation results in incorrect data, with low visitor counts and visitor-level segments not working as expected. Incorrectly implemented custom visitor ID’s also introduce heavy load on processing servers, increasing latency and decreasing report performance.

Visitor ID using the Web SDK

The Adobe Experience Platform Edge Network allows you to provide multiple identifiers using XDM’s Identity Map. Each identity in an Identity Map has a different namespace. You can specify which namespace should be used for Visitor ID as part of datastream configuration. Once this is configured, when you send an event with a value specified for this namespace, it will be automatically used as the Visitor ID in Analytics.