Q: What is the default attribution model for Floodlight?
A) First Click
B) Last Click
C) First interaction
D) Last Impression
Correct Answer is B) Last Click
By default, Search Ads 360 gives all credit for a conversion to the last click that leads a customer to your site. But a significant number of conversions may result from a path with several interactions—clicks on display ads as well as paid search clicks driven by shopping campaigns, generic or brand keywords, and other biddable items.
Read more here: https://support.google.com/searchads/answer/6194849