Wonderful, now you have your webpage available via IPFS. But suppose you have decided to make a change to this webpage? The IPFS hash above will only ever point to this first version of your webpage. By using IPNS (the InterPlanetary Name System), you can create a hash that will not change, but you will make it point to your changing content found within IPFS. The IPNS hash will be tied to your Peer ID, and any changes in the future will also be tied to your Peer ID.