There is a set of rules or regulations that exist in a blockchain to ensure the security of the Blockchain and the performance of others activities on the blockchain.

Yes I strongly agree with your words. It's the set of rules that other social media blockchain are adopting.

PoB is the best for me because everyone must show originality of his or her work. In the absent of PoB a lot of coping and paste contents would be seen on the platform.

You have discussed well about the topic. Best of luck to you sir.