A cryptocurrency wallet address is a string of letters and numbers that represent a virtual wallet that you can send and receive cryptocurrency through.
Each wallet address is unique and has a specific allocation on a blockchain.
You can think of it as an account number if you were comparing it to a bank account, and within that bank, you have multiple accounts for multiple currencies (USD, EUR, GBP, AUD etc). In a similar fashion, you can have a wallet address for BTC (Bitcoin), ETH (Ethereum) and any other type of cryptocurrency. Staying with the bank analogy, each bank will have particular account numbers for the particular currency and the same is for crypto. If you were to transfer say BTC from another exchange to Coinmetro, you would need to first find out your BTC wallet address from Coinmetro and use that as your destination.
Note: It is extremely important that you copy and paste your wallet address rather than entering it manually to avoid any mistakes and loss of your funds. Also, we advise you to make sure you have the correct wallet for the correct token.