I asked you what you understand about this weapon, not that I can expect someone like you to have knowledge on serious matters. And since you don't know anything on this topic I suggest you simply shut up.
Now for the rest of he people, here are some aspects about directed energy weapons -
1. Directed energy weapons do not employ any form of projectile motion. As such, directed energy weapons do not require the computation of ballistic trajectories to direct the beam at the target.
2. The energy for the directed energy weapons is derived from the conversion of electrical energy into the electromagnetic beam thus no additional shells, powder, etc are needed to make the system operational.
3. Direct energy weapons have a downside which is the operational cost It doesn’t make economic sense to use such weapons unless other weapons simply can’t do the job.
The most obvious and useful application of energy weapons would come in the field of missile-defence. Normal anti ballistic missiles are imperfect, laser shields will produce a far better network of air defense. USN is already testing their latest laser weapon addition.