Database consolidation involves integrating various database technologies into a single, more efficient system to reduce complexity, costs, and data redundancy. This process addresses the challenges of data sprawl, which results from using multiple specialized databases that increase storage costs and security risks. The text highlights the drawbacks of polyglot persistence, where organizations use different databases to meet specific needs, leading to a sprawling and costly data environment. Couchbase Capella is presented as a solution, offering a multi-purpose, fully managed NoSQL DBaaS that combines features of various databases, such as JSON document storage, key-value in-memory caching, full-text search, vector search, and more, into a single platform. This approach allows organizations to streamline their database stack, as demonstrated by Viber, which significantly reduced its server count and operational costs by consolidating with Couchbase.