Just like the Campeonato Brasileiro, teams in the lower series, like B and C, is often promoted to the very best division every year. In the situation of Italy, just the leading 3 groups in Serie B are promoted to Serie A (in Brazil, promotion happens for 4 groups in https://konhcichun44310.dreamyblogs.com/38030681/the-ultimate-guide-to-what-is-serie-a