Lead assignment rule is a feature that can be used to route new leads to the correct sales person based on the lead address. Lead assignment rule can assign leads to users or queues based on certain criteria, such as lead source, industry, or location. Lead assignment rule can also send email notifications to the new lead owners or other recipients. Reference: https://help.salesforce.com/s/articleView?id=sf.leads_assignment_rules.htm&type=5