Obligatory im not a physicist and am rather dumb
Fusion is combining two small atoms to make a bigger one, and it's what the sun's energy comes from. (Contrast with fission, breaking apart large atoms like uranium, which we already have commercial reactors for.)
This news article is about the National Ignition Facility (NIF) achieving nuclear breakeven, which is when the energy released by fusion is greater than the energy put in to heat the fuel (by some metric).
This is cool because it's been a longtime goal of fusion research. Theoretically, if you can recycle all that energy, you could use it to drive another fusion reaction, etc. It's the first step to getting enough energy you could spin a turbine and produce electricity. Future fusion experiments like ITER will have the goal of achieving higher ratios.
Ok, now the bad news. We already have a device that's capable of fusion breakeven, and it's called the hydrogen bomb. And the way that the NIF works, inertial containment fusion (ICF), is lot more similar to artificially detonating miniature atom bombs than to any kind of commercial fusion power.
The NIF shines hundreds of extremely powerful lasers on a capsule with a core of hydrogen fuel. The lasers obliterate the capsule and create a bunch of x-rays that compress it, for ~a nanosecond, to fusion temperatures and pressures.
First, those lasers aren't efficient, so while we get more than 100% of the energy that went into the fuel, it's less than 1% of the energy that went into powering the lasers as a whole. Which sounds a lot less impressive.
Second, fans of atomic bombs will note that this "x-rays compressing a hydrogen fuel for a fraction of a second" is exactly how the secondary in a thermonuclear weapon works. (This isn't an accident. The NIFs primary goal is testing physics related to nuclear weapons). So if you're cynical about this, you say, "well it seems like that's a lot of trouble to go to only to make a miniature h-bomb that doesn't work very well". ICF likely isn't a design that scales very well for all the same reasons your car doesn't use sticks of dynamite as fuel, but it is useful to test nukes without actually testing them.
Things like ITER are the next generation of experimental fusion reactors, and work by a different principle that compresses the fuel over a span of seconds or minutes. They're LHC-scale megaprojects that will take decades to construct and test. There's different challenges there from in a nuclear weapon, and it remains to be seen if they can be solved.