Lead qualification based on company size automation in Salesforce is a specific type of automation that is designed to automatically qualify leads based on their company size. This automation triggers when a lead's number of employees and annual revenue are over a certain threshold, and automatically changes the lead's status to "qualified lead."

The purpose of this automation is to help sales teams prioritize leads and focus their efforts on the most promising prospects. By automatically qualifying leads based on company size, sales reps can quickly identify high-value leads and avoid wasting time on leads that are unlikely to result in a sale.

The lead qualification automation is triggered when a lead's number of employees and annual revenue meet certain criteria that have been defined by the sales team. For example, the automation might be triggered when a lead's company has over 100 employees and generates over $10 million in annual revenue. Once these criteria are met, the lead's status is automatically changed to "qualified lead," indicating that the lead is a high-priority prospect that should be pursued by the sales team.

Overall, lead qualification based on company size automation is an effective way to streamline the lead qualification process and ensure that sales reps are focusing their efforts on leads with the highest potential for revenue generation.