add some eg in initial overview

Author: brozorec

content/stellar-contracts/accounts/smart-account.mdx

@@ -18,9 +18,9 @@ This separation is made practical by externalizing parts of the logic and state
 
 The framework separates three distinct concerns:
 
-- **What** (Context Rules): Defines the scope and conditions
-- **Who** (Signers): Identifies the authorized entities
-- **How** (Policies): Enforces business logic and constraints
+- **What** (Context Rules): Defines the scope (e.g. call `transfer()` on some token, call any function of a specific contract, deploy contracts, or just any call to any contract)
+- **Who** (Signers): Identifies the authorized entities (e.g. cryptographic keys, G-accounts, or other C-accounts)
+- **How** (Policies): Enforces business logic and constraints (e.g. amount < 500, every month, or 2-of-3 threshold)
 
 ```mermaid
 graph LR