Share your message across the world and time by inscribing it on Ethereum Blockchain (a distributed and public ledger). Anything you post can not be changed/deleted and will be there forever. It will be publicly visible forever by everyone.
Advertise your brand, social media account, NFT. Broadcast your message, propose marriage, leave a message to you grandchildren, spouse. Support your sports team, country, political party, heroes...
Connect to Ethereum MainNet with a dApp enabled browser (ie: with Metamask wallet) to post on the billboard. Once you have your wallet setup, you will see the entry fields for posting.