A CockroachDB Tech Writer describes the process of documenting new features, emphasizing the importance of understanding business value, thorough testing, and providing clear guidance. The writer highlights a unique feature of CockroachDB: the ability to span a cluster across multiple cloud platforms and migrate data between them with a single command, demonstrated through a video of deploying a 6-node cluster across Digital Ocean and GCE. This process showcases CockroachDB's flexibility, facilitated by the Gossip protocol for self-organization and the Raft consensus algorithm for data replication. The writer further explains how replication zones and node locality settings enable easy data migration and balance across different cloud environments without service interruption, encouraging users to test these capabilities themselves.