You can automate the process of sending Gmail messages to a public Slack channel using Zapier's workflow automation software. This allows you to focus on what matters while staying on top of important emails. With Zapier, you can create automated workflows called Zaps, which send information from one app to another without coding knowledge required. The process involves setting up a trigger in Gmail and an action in Slack, allowing you to customize where the message is sent and how it looks. You can test your Zap to ensure everything is working as expected before using it to receive private notifications about new emails or post messages in a public channel.