DApp is a decentralized software that runs on a peer-to-peer blockchain network. If you are still confused about DApp let’s see an example it will explain it clearly.
For example, we are all using Twitter and Facebook kind of apps, It runs on a computer system that is owned and controlled by a single organization. There are millions of users from one side but the backend is controlled and managed only by the particular organization. This leads us to give our complete authority to the particular organization. That means they don’t have to display certain content to users that can be easily deleted.
But in Dapp this makes impossible because Dapp development is supported by blockchain technology which is known for its immutability and robustness in nature. This is what exactly a Decentralized application is and the way of the DApp work is every action that has been recorded in the blockchain which makes it impossible to delete the record.