The concept of change capture in business applications enables use cases like audit logging, history browsing, and value attribution for content optimization, with benefits such as regulatory compliance and increased audience engagement. Fauna Cloud is used by Breezeworks to add change tracking to their Ruby on Rails application, which maintains a copy of the data in Fauna Cloud using an after_commit hook. This allows users to see who made changes and when, enabling features like historical views and event feeds. By teeing their data to Fauna Cloud, Breezeworks can get serverless change capture without impacting their existing database, delivering business value through improved customer support, management insights, and dispute resolution.