Typically a client has different tags implemented to track different conversions. So if they have three conversions: A, B and C. We will see logs for each conversion, e.g. ConvTagA, ConvTagB, ConvTagC.
Alternatively, a client can have a single conversion tag, e.g. ConversionTagMain, but can also capture extended data, e.g. ProductID, BrandID or transactionID. All of these fields can be leveraged by Abakus.
If a client is capturing transactionID they may also use this to join to their first party data.