Greetings,
I am using the "Marketing channel" dimension in AA to track information about campaigns, by breakdown the "Affiliate Marketing" channel with the "Tracking code" dimension I found out that there is an "Unspecified" category.
Is this a problem with tracking codes?
How Adobe recognize this tracking belongs to Affiliate Marketing Channel?
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It's very likely that your Marketing Channel and Tracking Code are on different attribution models, so mixing them generally doesn't work well.
Marketing Channels by default have a 30 Day attribution.
Tracking Code by default has a 7 Day attribution.
Really, you should probably be capturing your Tracking Code values in your Marketing Channel Detail dimension, as that is explicitly joined to Marketing Channel (same attribution, and set in the same processing rules).
At least, for your rules that are using "Tracking Code"... for other things, like Organic Search, you can change the Detail to be something more relevant.
For more details on what I mean by the attribution mismatch:
Visit 1 - campaign X (i.e. not covered by your other specific Marketing Channel Rules - Affiliate catches all the remaining campaign codes not caught by specific rules)
Visit 2 - direct, less than a week later
Visit 3 - direct, 2 weeks later
Now let's say you pull this week's data.. you will still have Marketing Channel and Marketing Channel Detail info, since they were set less than a month ago; but you will not see Tracking Code since that was set almost 3 weeks ago, and it only maintains the value for 1 week.
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I am assuming you have your campaid code getting set into tracking code (usually called as s_campaign or eVar0) and then using it to define your Marketing Channels, leveraging Proceeing Rules under Marketing Channel Manager.
In such a scenario, couple of things to check:
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