Series B is a funding round that helps startups grow after they have established a solid business model and gained initial traction. This stage typically follows Series A funding and is aimed at scaling operations, expanding the team, and entering new markets. Investors in Series B often include venture capital firms and private equity investors looking for promising companies with potential for significant growth. During Series B, companies may raise millions of dollars to enhance their product offerings and increase their customer base. This funding is crucial for startups like Uber or Airbnb, which require substantial resources to compete effectively in their respective industries.