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What is Ethereum?

At its core, Ethereum is a decentralized global software platform powered by blockchain technology. It is most commonly known for its native cryptocurrency, ether (ETH). Ethereum can be used by anyone to create any secured digital technology. It has a token designed to pay for work done supporting the blockchain, but participants can also use it to pay for tangible goods and services if accepted.Ethereum is designed to be scalable, programmable, secure, and decentralized. It is the blockchain of choice for developers and enterprises creating technology based upon it to change how many industries operate and how we go about our daily lives.Source

What is Optimism?

Optimism is an extension to Ethereum which enables users and developers to benefit from the latter’s strong security guarantees while being cheaper and faster. The OP token is used for governance and can be bought or sold on Coinbase and other exchanges. Optimism is a fast, stable, and scalable L2 solution built by Ethereum developers, for Ethereum developers. Optimism’s EVM-equivalent architecture scales your Ethereum apps without surprises. Committed to building a sustainable ecosystem through retroactive public goods funding, Optimism is scaling Ethereum’s present to provide funding for its future.Source

What is Polygon?

Polygon is a “layer two” or “sidechain” scaling solution that runs alongside the Ethereum blockchain — allowing for speedy transactions and low fees. MATIC is the network’s native cryptocurrency, which is used for fees, staking, and more. You can buy or sell MATIC via exchanges like Coinbase. The Ethereum blockchain is home to a vast range of economic activity — from NFT markets and games to the growing DeFi ecosystem. Ethereum is well suited to this activity because it’s compatible with smart contracts, which can be used to build a vast range of applications. Source

What is Uniswap?

Uniswap is the largest decentralized exchange (or DEX) operating on the Ethereum blockchain. It allows users anywhere in the world to trade crypto without an intermediary. UNI, the governance token that allows users to vote on key protocol changes, is the fourth largest cryptocurrency by market cap on Coinbase as of April 2021 — with a total value of more than $18 billion. Uniswap was one of the first decentralized finance (or DeFi) applications to gain significant traction on Ethereum — launching in November 2018. Since then, numerous other decentralized exchanges have launched (including Curve, SushiSwap, and Balancer), but Uniswap is currently the most popular by a significant margin. As of April 2021, Uniswap had processed over $10 billion in weekly trading volume.Uniswap pioneered the Automated Market Maker model, in which users supply Ethereum tokens to Uniswap “liquidity pools” and algorithms set market prices (as opposed to order books, which match bids and asks on a centralized exchange like Coinbase) based on supply and demand. By supplying tokens to Uniswap liquidity pools, users can earn rewards while enabling peer-to-peer trading. Anyone, anywhere, can supply tokens to liquidity pools, trade tokens, or even create and list their own tokens (using Ethereum’s ERC-20 protocol). There are currently hundreds of tokens available on Uniswap, and some of the most popular trading pairs are stablecoins like USDC and Wrapped Bitcoin (WBTC).Source