How do earn a badge?
To earn an assessment badge, you must score 80% or higher and complete the assessment within the allotted timeframe. You have 3 attempts to do so.
If you score 80% or higher on multiple attempts, your highest score is released.
How long do badges last?
As long as you want them to. You do not need to re-take assessments/earn new badges each time you go live. Rather, badges roll over from batch (live window) to batch.