To add an NFT to your Twitter profile, you should first download the Twitter Blue app and connect your NFT wallet. You can use one of the popular NFT wallets like MetaMask, Coinbase Wallet, or Rainbow. Once you have your NFT wallet, connect it to Twitter, and choose your NFT profile picture. After that, you can visit https://www.socialplug.io/services/nft-twitter-likes to buy NFT Twitter likes.