What is optimization in DV360?
The Optimization view shows if your insertion orders and line items are on track to hit spend and performance goals. In the line item tables, the Optimization view will also show recommendations for changes to make to improve pacing and performance.
What are the KPIS that they will achieve via DV360?
A goal and key performance indicator (KPI), and optionally enter a specific KPI amount. The goal and KPI will be used to provide optimization recommendations, power automatic budget allocation (if it's turned on), and visualize performance against the goal you've set.