In short, since IPFS is content-based addressing, it creates the address of a file according to the data contained in the file. If you want to share the IPFS address with others, every time you update the content, you will generate a new link and need to resend it to the * * * sharing party, which will be very troublesome.

use the Inter Planetary Name System (IPNS) to create addresses that can be updated.

the name in ipns is a hash of the public key. It is associated with a record that contains information about the hash linked to it, which is signed by the corresponding private key. New records can be signed and published at any time.

/ipns/QmSrPmbaUKA3ZodhzPWZnpFgcPMFWF4QsxXbkWfEptTBJd

https://docs.ipfs.io/concepts/ipns/