The link explains that CouchDB can have replicas on mobile phones and websites, meaning clients don't always have to be connected to the internet.
> The Couch Replication Protocol lets your data flow seamlessly between server clusters to mobile phones and web browsers, enabling a compelling offline-first user-experience
> The Couch Replication Protocol lets your data flow seamlessly between server clusters to mobile phones and web browsers, enabling a compelling offline-first user-experience