Shield

Shields are an interesting material : they consume energy production to stay charged, and deflect non explosive projectiles, mainly lasers.

Main use
Shields are generally used to deflect Firebeam and Plasma Laser as they'll deflect both perfectly, if you place them correctly they can even harm the opponent.

The issue is they'll be disabled by all explosive weapons, the only weapons able to attack its HP. Other weapons are deflected, but don't go back to the ennemy unless you use Scattershot as Commanders. Shockenaugh will absorb the Energy from beams, giving you the energy used to fire them in your energy storage.

Other uses
They are often used as a protection for Turbine as they let wind pass through.

Lots of shenanigans can be done with shields, because you can reflect your own lasers with them. For example, you can make a "periscope" using shields and doors, so your laser can't be attacked by anything except lasers shooting through it. The Energy upkeep is a bit large though.

Unexperienced players tend to shieldspam, which leads them to Energy costs so large that they can't build anything, and their shields will be disabled.