In Salesforce, WhoId and WhatId help relate Tasks and Events to other records:
WhoId → Refers to people (Lead or Contact).
WhatId → Refers to objects (Account, Opportunity, Case, Campaign, or Custom Object).
🔹 Example: Assign a follow-up task to a Contact (WhoId) about an Opportunity (WhatId).
These fields ensure seamless activity tracking across Salesforce. 🚀