The phrase "to expand that influence" means to increase or grow the power, impact, or control that someone or something currently has over a particular situation, group of people, or area. Full definition
Teacher leaders continuously think about how to expand their influence in education to ultimately benefit students both locally and globally. (teachtrainlove.com)
Your goal is to take control of one of four states and then expand your influence by taking over various locations that will produce resources for you. (wolfsgamingblog.com)
The conference provides the opportunity for you to start the new year right by gaining the knowledge and skills you need to expand your influence beyond the doors of your school. (ascd.org)