Business incubators have become vital components of entrepreneurial ecosystems by supporting startup development, innovation, resource acquisition, and business sustainability. Incubators provide entrepreneurs with infrastructure, mentorship, networking opportunities, access to funding, technical support, and business development services that improve startup survival and growth rates. In an increasingly competitive and technology-driven economy, startups face numerous challenges including financial constraints, market uncertainty, limited managerial expertise, and operational inefficiencies. Business incubators help address these challenges by creating supportive environments that accelerate entrepreneurial success. This study examines the role of business incubators in startup growth by exploring incubation models, support mechanisms, performance outcomes, challenges, and emerging trends. Through a narrative review of academic literature, policy reports, and entrepreneurial ecosystem studies, the research highlights the positive impact of incubators on startup performance, innovation capability, employment generation, and sustainable economic development. Findings suggest that incubators significantly contribute to startup scalability, investment readiness, and long-term sustainability.