Your question is Clean Data for Visual Analytics. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're working with data that will feed a visual analytics layer. The source data is messy, with missing values, duplicate records, inconsistent timestamps, and fields that do not always match the expected schema.
Describe your experience with data cleaning and preprocessing for visual analytics.