The Relativistic Heavy-Ion Collider in the Brookhaven National Laboratory is designed to investigate the properties of Quark-Gluon Plasma (QGP), and imminent to finish its science mission. Among many probes of QGP, jets - algorithmic recombination of final-state particles - are considered to be one of the most prominent probes. They originate from hard scattered partons created at the very early stage of the collisions and interact strongly with the medium as they traverse it. In this seminar, jet results from RHIC that shed light on the QGP properties will be discussed, covering topics such as inclusive and semi-inclusive yields, jet hadrochemistry, jet acoplanarity, and jet substructure in both heavy-ion and small-system collisions (O+O and Ru+Ru/Zr+Zr). Also, the forthcoming results from the current RHIC data-taking campaign from STAR and sPHENIX will be summarized.