Folks - questions on the below.

>> DO NOT make use of any Multi-Signature wallet as we will not support them and your transaction will not go through.

>> Recommended Gas Limit: 130,000

>> Recommended Gas Price: 50 gwei

What is a multi signature wallet? I am planning to use ledger nano s to send Ethers. Is ledger a multi signature wallet?

When sending Ethers from MEW, I see a field for gas and seems like the recommendation is to use 130,000. What is the gas price - 50 gwei. Do we need to enter it anywhere?