Jessica Lovegood discusses sustainable business growth through a user experience focused approach. She argues that businesses should focus on three key areas: 1) Creating excellent products and services so that customers sell the business through word-of-mouth referrals, 2) Having efficient business processes while never sacrificing quality, and 3) Spreading brand awareness through low-cost methods such as social media rather than expensive advertising. By prioritizing great user experiences, businesses can see growth through customers marketing the products themselves without unnecessary spending.