✅ Explanation:
A typical use case for Salesforce Data Cloud is to ingest, unify, and harmonize data from multiple sources and platforms — such as CRM, marketing, commerce, and third-party systems — into a single, unified customer profile.

This enables organizations to:
Break down data silos
Perform identity resolution
Create 360° customer views

Power personalized experiences across channels
❌ Why the other options are incorrect:
A. Data synchronization across the Salesforce ecosystem

❌ While Data Cloud interacts with the Salesforce ecosystem, synchronization is handled more by tools like Salesforce Connect, Change Data Capture, or MuleSoft — not Data Cloud’s primary role.

B. Storing CRM data on premises
❌ Salesforce is a cloud-based platform; Data Cloud does not store data on-premises.

D. Sending personalized emails at scale
❌ This is a use case for Marketing Cloud, not Data Cloud. Data Cloud can inform such
campaigns with unified data, but does not send emails itself.