Billing automation is the use of technology to automate the creation and sending of invoices, the tracking of payments, and the management of customer data. This can include tasks such as automatically creating invoices based on predefined rules and data, auto-sending invoices to customers via email or postal mail, performing automated payment processing, and updating customer account information. The main goal of invoicing automation is to streamline and improve the entire invoicing process to make it more efficient and accurate.