What is Decentralized Applications (dApps)

Decentralised Applications (dApps) are software applications that run on blockchain networks rather than centralised servers controlled by a single company. Because their backend logic is encoded in smart contracts deployed on public blockchains, dApps operate without the ability of any single entity to shut them down, censor users, or alter the rules without community consensus.

HOW DAPPS DIFFER FROM TRADITIONAL APPS

Traditional Apps: Backend servers controlled by a company (Amazon, Google, or the app developer). The company can change rules, delete your account, go bankrupt, or be shut down by regulators at any time. Your data is stored on their servers.
dApps: Backend logic lives in smart contracts on a public blockchain. The frontend (website/interface) may be hosted traditionally, but the core functionality fund management, governance, trading exists on-chain and is permissionless. No single party can freeze your funds or change contract rules without the community's governance approval.

HOW DAPPS WORK

A dApp consists of Smart Contracts (the backend deployed on Ethereum, Solana, BNB Chain, etc.), a Frontend Interface (typically a web application that users interact with via their browser), and a Web3 Wallet Connection (MetaMask, Phantom, or similar) that lets users sign transactions and interact with the smart contracts directly.

TYPES OF DAPPS

DeFi dApps: Uniswap (decentralised exchange), Aave (lending/borrowing), Compound (lending), Lido (liquid staking), Curve (stablecoin swaps).
NFT Platforms: OpenSea, Blur, Magic Eden, Zora for minting and trading NFTs.
Gaming dApps: Axie Infinity, Gods Unchained, Illuvium play-to-earn games with blockchain assets.
Social dApps: Lens Protocol, Farcaster decentralised social media where users own their content.
Governance dApps: Snapshot, Tally for DAO voting and proposal management.
Prediction Markets: Polymarket, Augur decentralised betting on real-world events.

CHALLENGE

SdApps face UX challenges (wallet setup friction), gas fee costs, scalability limitations, and smart contract security risks. Layer 2 networks are addressing speed and cost concerns.

Terms in addition to the Decentralized Applications (dApps)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.