Venture capital involves providing funding to young companies that cannot raise capital through public markets or bank loans. Venture capitalists typically invest in early-stage companies and expect returns of 30-50% over 3-7 years. They are actively involved through board seats. Venture capital started growing in the US post-World War II and boomed in the 1960s and 1980s but saw declines. On average, 3 out of 10 venture investments are successful, yielding returns of 5-10 times the initial investment. Venture capitalists add value through strategic guidance and connections.