The document outlines a marketing and customer journey use case for a French energy provider, emphasizing the importance of customer acquisition, retention, and value building in a competitive market. It highlights key strategies including effective use of digital features, marketing automation, data architecture, and programmatic ad buying, which led to significant improvements in customer engagement and reductions in churn rates. Ultimately, after a year of development and eight months of operation, the provider achieved substantial market capture, becoming a significant player in the energy sector.