Theoretically, the role of the Higgs boson (this can be viewed as a "force") is to give other particles mass: it is similar to what happens when light goes through air. Light hits the air molecules and slows down: in this manner, particles traveling through a "Higgs field" are slowed down to a higher mass.
But the Higgs boson might not exist. The argument is that Higgs bosons are said to be hadrons made up of top quarks, and top quarks were made in the reheating period of the electroweak era. Now, they had to have mass, or else energy could not have cooled into them. As in E=mc squared, the energy equivalence is to mass, and not matter. When the Higgs boson formed in the quark epoch, it supposedly gave mass to all particles, which like the top quark already had mass.
In the case that the hypothetical Higgs boson is not a reality, here's my "Higgsless model" of how particles get their mass:
According to Einstein's theory of special relativity, energy is equal to mass times the speed of light squared. Therefore, if a particle transforms its mass into energy, then it is traveling at the speed of light. That makes sense, as photons have no mass and are traveling at light-speed, and as neutrinos are almost massless and travel at almost the speed of light.
One of my counterarguments is that if the resulting particle had no mass, it would not produce energy. But the "rest mass" (the mass that all particles at a standstill would have) would produce energy, and that energy would determine the speed of the particle. This is the simple answer to why the Higgs boson has not been detected in the LHC!