He shouts messages to the town, particularly those to do with quests. He also shouts information of active Mini World Changes.
Besides the mini world change statuses he also says:
"Hear me! Hear me! The mage Wyrdin in the Edron academy is looking for brave adventurers to undertake a task!"
"Hear me! Hear me! The postmaster's guild has open spots for aspiring postmen! Contact Kevin Postner at the post office in the plains south of Kazordoon!"
"Hear me! Hear me! The inquisition is looking for daring people to fight evil! Apply at the inquisition headquarters next to the Thaian jail!"
He doesn't seem to react to anything you say to him. The three new Mini World Changes introduced in Updates/9.6 are not announced by him. CipSoft members stated more time was needed to fix issues with the correctness of his announcements, which came up during the test server.