- Web Summit is the largest tech conference in the world with over 70,000 attendees from companies like Google, Amazon, and the Gates Foundation. - The talks at Web Summit in 2019 focused on sustainability, social good, climate change, and the UN Sustainable Development Goals, showing that even the largest tech companies are prioritizing environmental issues. - Development organizations should consider how to engage with major tech companies to advance issues like sustainability and climate change. New technologies like 5G, blockchain, and AI could support efforts towards the SDGs.