The mass of the Higgs boson is 125 GeV, and its existence is tied to the Higgs field, which provides mass to particles through interactions. The Higgs bosons themselves are a consequence of the Higgs mechanism, and while they are not necessary for particles to have mass, they are essential for understanding the properties and interactions of particles within the Standard Model. The Higgs boson interacts with fermions and weak bosons, and its interactions can be understood through the framework of quantum field theory. The discussion also touches on the complexities of chirality and how mass affects particle behavior, particularly in weak interactions. Overall, the Higgs mechanism is crucial for explaining how particles acquire mass without violating fundamental physical laws.