The document discusses 4 elements of a smart growth model for big brand SEO: growth model, hiring, training, and efficiency. It presents examples of how an SEO team grew from 2009 to 2013 by implementing a growth model that focused on hiring qualified candidates, thorough training, maximizing efficiency through succession planning and automation, and minimizing 15% annual tech turnover. The growth model emphasizes hiring based on business needs, leveraging existing resources, and continuous improvement.