The document discusses publishing structured event data to applications for analytics. It describes serializing event data from sources like emails and logs into Avro documents and loading them into Pig for processing. The data is then published from Pig to databases and analytics stacks using various options like ElasticSearch, MongoDB, HBase, and Hive/HCatalog for exploration and building analytics applications. Code examples demonstrate loading Avro data into Pig, illustrating the data schema, and publishing the data from Pig to MongoDB. The overall approach emphasizes agility, iteration, and flexibility in building analytics applications on Hadoop.