Merge pull request #8521 from wslyvh/patch-3

Add context to testnets and re-order Goerli/Sepolia

Author: corwintines

src/content/developers/docs/networks/index.md

@@ -32,22 +32,23 @@ Most testnets started by using a proof-of-authority consensus mechanism. This me
 
 ETH on testnets has no real value; therefore, there are no markets for testnet ETH. Since you need ETH to actually interact with Ethereum, most people get testnet ETH from faucets. Most faucets are webapps where you can input an address which you request ETH to be sent to.
 
-#### Goerli {#goerli}
+#### Which Testnet should I use?
 
-Goerli is a proof-of-stake testnet, and is the recommended default testnet for testing of validating and staking.
+The two public proof-of-stake testnets (which client developers are maintaining post-merge) are Goerli and Sepolia. The Goerli network was merged with the Prater Beacon Chain testnet. The Sepolia network was created to test the transition to proof-of-stake.
 
-- [Website](https://goerli.net/)
-- [GitHub](https://github.com/goerli/testnet)
-- [Etherscan](https://goerli.etherscan.io)
+**[Sepolia](#sepolia) is the recommended default testnet for application development**.
+The Sepolia network uses a permissioned validator set. It's fairly new, meaning its state and history are both quite small. This means the network is quick to sync to and that running a node on it requires less storage. This is useful for users who want to quickly spin up a node and interact with the network directly.
 
-##### Goerli faucets
+- Closed validator set, controlled by client & testing teams
+- New testnet, less applications deployed than other testnets 
+- Fast to sync and running a node requires minimal disk space
 
-- [Goerli faucet](https://faucet.goerli.mudit.blog/)
-- [Chainlink faucet](https://faucets.chain.link/)
-- [Alchemy Goerli Faucet](https://goerlifaucet.com/)
-- [All That Node Goerli Faucet](https://www.allthatnode.com/faucet/ethereum.dsrv)
+**[Goerli](#goerli) is the recommended default testnet for testing of validating and staking**. 
+The Goerli network is open for users wanting to run a testnet validator. Stakers wanting to test protocol upgrades before they are deployed to mainnet should therefore use Goerli.
 
-To launch a Validator on Goerli testnet, use ethstaker's ["cheap goerli validator" launchpad](https://goerli.launchpad.ethstaker.cc/en/).
+- Open validator set, stakers can test network upgrades
+- Large state, useful for testing complex smart contract interactions 
+- Longer to sync and requires more storage to run a node
 
 #### Sepolia {#sepolia}
 
@@ -63,6 +64,23 @@ Sepolia is a proof-of-stake testnet, and is the recommended default testnet for
 - [Sepolia faucet](https://faucet.sepolia.dev/)
 - [FaucETH](https://fauceth.komputing.org)
 
+#### Goerli {#goerli}
+
+Goerli is a proof-of-stake testnet, and is the recommended default testnet for testing of validating and staking.
+
+- [Website](https://goerli.net/)
+- [GitHub](https://github.com/goerli/testnet)
+- [Etherscan](https://goerli.etherscan.io)
+
+##### Goerli faucets
+
+- [Goerli faucet](https://faucet.goerli.mudit.blog/)
+- [Chainlink faucet](https://faucets.chain.link/)
+- [Alchemy Goerli Faucet](https://goerlifaucet.com/)
+- [All That Node Goerli Faucet](https://www.allthatnode.com/faucet/ethereum.dsrv)
+
+To launch a Validator on Goerli testnet, use ethstaker's ["cheap goerli validator" launchpad](https://goerli.launchpad.ethstaker.cc/en/).
+
 #### Ropsten _(deprecated)_ {#ropsten}
 
 _Note, [the Ropsten testnet is deprecated](https://github.com/ethereum/pm/issues/460) and will no longer receive protocol upgrades. Please consider migrating your applications to Sepolia or Goerli._