NFT royalties allow creators to earn a percentage of sales every time their NFT is sold in the secondary market. This mechanism is set at the time of the NFT's creation and recorded on the blockchain. Whenever an NFT changes hands, a predefined percentage of the sale price is sent to the creator's wallet automatically. This not only incentivizes creators but also helps them maintain a continuous financial benefit as their artwork or asset gains value over time. Many platforms such as OpenSea and Rarible have built-in royalty structures, but the enforcement relies on adherence from marketplaces and resellers.