The exploration of spin dynamics in heavy ion collisions has become a crucial pathway for unraveling the complex interactions within the fundamental strong force and the angular momentum of subatomic particles. This paper delves into the nuanced aspects of spin physics in the realm of high-energy heavy ion collisions. We investigate the diverse roles that spin plays in revealing the properties of the quark-gluon plasma (QGP), a transient state of matter that existed mere microseconds after the Big Bang. This presentation offers a comprehensive overview of the experimental advancements concerning the global spin effects in heavy ion collisions. Specifically, we address the global polarization of hyperons and the global spin alignment of vector mesons. Furthermore, we explore how these phenomena manifest as outcomes of the intricate dynamics of quarks and gluons within the fireball created in these collisions. This investigation has the potential to offer valuable insights into the properties of strongly interacting QGP matter.