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Level 5

If you're reporting on "Unique Clicks" in DCM, this will only report one click per user, regardless of whether that person clicked multiple times. Where adobe will report a new visit each time that unique user clicks through on a campaign. This difference in reporting methodology ihas the potential to cause the inconsistency you're seeing. Especially if this is a retargeting campaign, and the same users will be seeing the same ads multiple times.

Is DCM showing more unique clicks than Adobe is showing unique visitors? Those two numbers should ideally be in close alignment.