Swarm and accessing ipfs

What does swarm source mean when I am looking at smart contracts?

When I read up, swarm is a decentralized storage solution, but why would some contracts need to store data off-chain, e.g. the contract for DAI?

Also, how do I access the ipfs link? When I try to use ipfs desktop, I am unable to locate the file:

Or when I try to use brave browser I get an error saying that it is an invalid CID:

Appreciate any help, thank you!

could you paste that link?


ok, it doesn’t work with IPFS