Shatter | D4 Sorcerer Key Passive

Shatter is a Sorcerer Key Passive with the following effect (simplified):
After Freeze expires, enemies explode for 25% of the damage you dealt to them while Frozen.

Once you select Shatter as your Key Passive, you can't select any other Sorcerer Key Passive. They're considered to be very important parts of your build, so it merits quite a bit of possible discussion.

How best to use Shatter

Basically this segment will be giving you a rundown on the basics on the "WHEN, HOW, and WHY" of the Shatter Key Passive.

Questions we would answer here would be like:
How to use Shatter, as a baseline.
Why you would choose Shatter over other Key Passives.
When would you consider Shatter? As a build-around? An "augmentation"?

Shatter Core Synergies

TBA: When choosing Shatter, are there "absolute godtier" level synergies you essentially NEED to take?

Related Links & Other Information

Still got a lot to do, a lot of data to track, and how best to present it! Post-launch will clarify alot of this for us!

In the meantime, Related Links:

• If you're here, you're probably looking for some info on the Sorcerer Class.
• Related Skill Tree Nodes: Shatter
• Summary of all D4 Build and Character Customization Systems.