United States, April 21 -- Mastercard is gearing up to launch its third annual Small Business Summit series, convening entrepreneurs, financial institutions, local leaders and industry experts during National Small Business Month. The one-day events will deliver hands-on education, mentorship and practical resources designed to help small businesses start, grow and operate with confidence.Small businesses generated nearly half of U.S. GDP last year, according to the U.S. Small Business Administration. The series is designed to help owners close common gaps in capital readiness, digital tools and trusted networks by connecting them with experts, peers and actionable guidance.The series kicks off during National Small Business Month in May. E...