This document discusses customer analytics at Zalando and outlines the 5 stages of data grief: collection, consolidation, interpretation, activation, and validation. It describes some of Zalando's analytics capabilities like brand and category recommendations. It also notes the challenges of data collection from over 100 microservices using various technologies and the process of moving to a more standardized up-front data design. Data consolidation involves bringing siloed data together, while interpretation is done by dedicated analysts and those embedded in business teams. Testing and product evaluation help activate the data.