The HTTP to IPFS Gateway
The gateway hosted at https://ipfs.io allows browsers and tools that speak http
to access content from the IPFS network. It provides the canonical way to address IPFS content via http scheme urls.
A request for:
https://ipfs.io/ipfs/QmZULkCELmmk5XNfCgTnCyFgAVxBRBXyDHGGMVoLFLiXEN
...will hit the gateway and get forwarded to an IPFS node, which fetches the block for the CID QmZULkCELmmk5XNfCgTnCyFgAVxBRBXyDHGGMVoLFLiXEN
and returns the content via http.