Vtiger CRM is a unified CRM solution that can be used by sales, customer support, and marketing teams. It offers features such as web forms, email and SMS campaigns, lead scoring, sales insights, appointment scheduling, approvals, team mailbox, document tracking, automated workflows, work orders, inventory management, case routing, surveys, and project management. The system stores all customer data in a single database and can be customized to suit the needs and preferences of the user.