You don’t need to provide any information at all in order to use Bitcoin Cash. However, you should be aware that all BCH transactions are public, as the Bitcoin Cash ledger is fully transparent. All transactions made on the BCH blockchain are publicly available here on Bitcoin Cash block explorers. This information is relatively useless to most users, however, a person with a specific knowledge and toolset could easily use this info to track specific transactions. In general, you should be wary of publicly associating your real world identity to a cryptocurrency address you control.
Bitcoin Cash is an open-source decentralized cryptocurrency. Bitcoin Cash was created as the result of a hard fork of the Bitcoin blockchain, and resembles Bitcoin in many ways. Just like Bitcoin, the Bitcoin Cash blockchain also uses a Proof-of-Work consensus model (mining). In comparison to Bitcoin, the Bitcoin Cash project is more focused on making Bitcoin Cash suitable as a medium of exchange, adopting several updates designed to increase scalability.
Shortly after Bitcoin was created and a block size limit was implemented (1MB), a discussion regarding the block size began. This was a smaller issue at the time, as the network was not so popular. However, by 2017, this was one of the main issues Bitcoin’s network had.
Due to the small block size, and a sudden increase in popularity, more and more transactions were being sent using the Bitcoin blockchain. Ultimately, this negatively affected the user experience – those who didn’t want to pay an exorbitant transaction fee had to wait hours, or in some cases even days, to see their transaction completed.