How does arc/solar/void damage work?

I have recently found a few weapons (mostly fusion rifles) that deal arc, solar, or void damage instead of kinetic damage.

Do these "elemental" weapons provide some sort of benefit over kinetic weapons? Are some enemies weaker to arc, solar, or void damage?

Each element is tied to a certain enemy faction. and their shields is that element. using the element on them deals bonus damage and helps take down the shields much faster.

• Fallen - Arc damage, signified by blue shields
• Hive - Solar damage, signified by orange shields
• Vex - Void damage, signified by purple shields (exception: some Harpies have arc shields)
• Cabal - Solar damage, signified by orange shields

Most of the time you won't need the element to deal damage, but in a few rare cases I've noticed one area so far with Vex Harpies with Arc shields that take damage from Arc attacks, but resist all others (still do damage, just a lot less).

Your primary weapon will usually be Kinetic damage. Your special and heavy weapons can and should have an element. Preferably one of each element so you are prepared for any encounter.

Yes, some enemies are weaker to certain kinds of damage.

This mostly won't matter until you're at end-game content and you'll start to see enemies get resisted notifications pop up when you hit them.

For me the best weapons so far are the electric ones since they drop shields fast. Even so, precision shots (head or crotch gem depending on the enemy) tends to outweigh damage type.