Accelerators are programs designed to help startups grow quickly by providing resources, mentorship, and funding. They typically last a few months and culminate in a "demo day," where entrepreneurs pitch their ideas to potential investors. By connecting startups with experienced mentors and a network of industry contacts, accelerators aim to increase the chances of success for new businesses. Many well-known accelerators, like Y Combinator and Techstars, have helped launch successful companies. These programs often focus on specific industries or technologies, allowing participants to gain valuable insights and support tailored to their needs. Overall, accelerators play a crucial role in fostering innovation and entrepreneurship.