Communication between Lightning Web Components on a page can be achieved through events, public properties, and the @wire service. Components can dispatch custom events to send data to parent components. Public properties (decorated with @api) allow data to flow from parent to child components. The @wire service can be used to share data from Salesforce data sources across components. Additionally, the Lightning Message Service (LMS) enables communication between components that are not in the same DOM tree, providing a more flexible way to share data across different parts of the application.
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