Zakat:

1. Purifies your wealth
2. Protects you from greed
3. Supports the vulnerable
4. Creates social balance

Take, (O, Muhammad), from their wealth a charity by which you purify them and cause them increase, and invoke [Allah ‘s blessings] upon them. Indeed, your invocations are reassurance for them. And Allah is Hearing and Knowing. - Surah At-Taubah 9:103 Quran