Which metric reports on how often a channel contributes to a conversion prior to last-click attribution?
- Assisted conversion
- Primary conversion
- Last-click attribution
- Second-to-last-click attribution
Assist interaction is any interaction that is on the conversion path but is not the last interaction. If a channel appears anywhere—except as the final interaction—on a conversion path, it is considered an assist for that conversion. The higher these numbers, the more important the assist role of the channel.
Read more here: https://support.google.com/analytics/answer/1191204