The answer is actually in the question. The God Particle, or Higgs Boson as it is scientifically referred to, is a hypothetical particle which physicists believe gives atomic particles, and as a result everything else, mass. Physicists across the globe are conducting experiments to try and prove it’s existence. Right now, nobody knows why particles acquire mass, and that is a hole that has existed in the standard model for 50 years.
In the 1960s several groups of physicists, including Peter Higgs, separately came up with the complicated idea of how particles acquire mass. A field, now knows as the Higgs Field, is thought to interact with the Higgs boson. It is in this interaction where particles are believed to acquire mass. This is kind of important since without this interaction science can’t accurately explain why the galaxy is what it is. And as explained in a briefing paper from CERN, “The universe would be a very different place…. no ordinary matter as we know it, no chemistry, no biology, and no people”.
So science shall hunt for the Higgs boson as it fills a hole and helps reinforce the standard model for particle physics. It will show that physicists are on the right track. The answer, if it is proven correct will finally tell physicists why particles have mass. Which tells them why these particles come together to create atoms, which in turn creates matter.