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The Higgs field is extremely important in particle physics. It's no exaggeration to say that your existence is enabled by it. Without it, atoms would not exist; electrons would zip away from nuclei at the speed of light. The value of the Higgs field determines what kinds of nuclei are stable and some of the differences between matter and antimatter. Almost all particles we know of are affected in some way by the Higgs field.
What
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have we discovered?
We have found a new particle which, on the whole, appears to have the properties expected for the simplest Higgs boson model. This new particle has a mass about that of an atom of cesium. We can only make general statements now because we just have enough data to claim that we see something, but not enough data to know precisely how it behaves.
This point is important because there are many theories which would modify these properties from the simplest model. Our discovery has already ruled out many ideas that would have predicted that we would see nothing at all, that it would be at a different mass, or that it would decay wildly differently.
Ok, you found it, are you done now?
Not by any means. We have found something, but