# Step 4.5 Add a graffiti

### **What is graffiti?**

Graffiti, within the Ethereum network, represents a unique and expressive feature that enables users to leave their mark on the blockchain. Specifically, validators, responsible for proposing blocks in the Proof-of-Stake (PoS) consensus mechanism, possess the exclusive privilege of including a graffiti field in their proposed blocks. This graffiti field empowers validators to append arbitrary data, messages, or even artistic expressions to the Ethereum blockchain. By incorporating graffiti, validators infuse their contributions with creativity and personalization, ensuring their impact is memorable and distinctive. It is through this mechanism that validators imprint their individuality upon the Ethereum network, leaving a lasting impression.



### Where can you see it?

In Ethereum, the graffiti field can be found within the block header of a proposed block. Validators, who have the authority to propose blocks in the Proof-of-Stake (PoS) consensus mechanism, can include their desired graffiti in this specific field. It is important to note that graffiti is not stored in the transaction data but rather in the block header, making it accessible to anyone who examines the block's information.



**Note: This feature is non-mandatory and is intended purely for fun! If you do not wish to add any graffiti, simply leave it blank.**

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