Personalization in digital experiences presents both opportunities and challenges, particularly in managing the vast amounts of data required. Relational databases often struggle with the high-volume, high-velocity data necessary for personalization, such as clickstream data, due to their limited scalability and fixed data models. In contrast, distributed NoSQL databases like Couchbase offer flexible data models and the ability to scale elastically, making them better suited to handle extensive data needs. Companies such as Dominos, Marriott, and Comcast have successfully utilized Couchbase to enhance their customer engagement through personalized experiences. Dominos leverages real-time data for targeted marketing campaigns, Marriott provides personalized customer experiences with improved online reliability, and Comcast consolidates customer interactions for better support. These organizations benefit from Couchbase's capabilities, including integrated caching for faster operations, scalability, and multi-model features that support both operational and analytical workloads, leading to improved customer loyalty and business performance.