add description to the example

Author: unclezoro

readme.md

@@ -4,9 +4,12 @@ This repository hosts a collection of examples implemented in both Golang and Ja
 The client implementation follows the API standards of [BEP-414](https://github.com/bnb-chain/BEPs/blob/master/BEPs/BEP-414.md).
 The examples include:
 
-- Wallet integration
-- Centralized Exchange (CEX) integration
-- Payment gateway integration
+- Wallet integration: The wallet can detect transactions eligible for sponsorship through MegaFuel's API, 
+and send these sponsorship-eligible transactions via the paymaster.
+- Centralized Exchange (CEX) integration: Token issuers promote the adoption of their tokens by sponsoring CEX users 
+to withdraw funds with zero gas fees. The CEX then manages this sponsorship policy through MegaFuel's interface.
+- Payment gateway integration: The payment gateway sponsors consumers to pay with ERC20 tokens without incurring gas 
+fees, using MegaFuel to manage the sponsorship policy.
 
 
 ## Network Endpoint