BREVO Email Marketing CSV import, list setup, and segmentation

Consolidate 34 CSV files into a single segmented client list, ensuring deduplication and correct segment application. The 34 CSV files containing client data: first name, last name, email, and segment. - Ensure the consolidation process includes deduplication for clients listed in multiple CSV files under different segments. - Apply appropriate client segments during the import process as per original CSV file designation.