Sales performance measures how strongly products or categories sell, using indicators such as sales volume and revenue. Comparing those indicators across regions turns a broad question—what sells best?—into a practical decision about where to focus inventory, marketing, or investigation. section 3.3.1
Category performance by Brazilian state
Merge product, translation, order, and customer data; group records by English product category and customer state; calculate order counts and summed prices. Bar plots compare categories across states, while heatmaps make regional patterns easier to scan.
Treat the output as evidence to inspect, not an automatic conclusion. Check merged columns and raw records when plotting fails or results look implausible; for example, a missing customer_state column can stop visualization.
