Reaccelerate: Finding new engines of growth in your business` is a talk about how to find areas of growth in a business during tough economic conditions. The speaker, Des Traynor from Intercom, emphasizes the importance of working out what's already working in the business and focusing on those strong parts. He also highlights the need to simplify the business by removing complexity and avoiding adding unhealthy or unprofitable lines of revenue. Des suggests that founders should focus on building for a new world rather than just trying to survive, and encourages them to find their strongest core business and optimize around it before exploring other growth opportunities. The talk emphasizes the importance of being mindful of the asymmetry of mediocrity and avoiding adding complexity or unhealthy elements to the business.