On blockchains, coins are sent to long strings of letters and numbers known as Addresses. These can look like "bc1b01952e7d3e24653f5fa04d532035263321924f25aa8584607106c20ec211" on Bitcoin or "0x254f0c0fe06d250fC35d4e68D0d63FD082C8C6e8" on Ethereum Classic. These addresses are generated by blockchain software called "Wallets".
Always make sure you are using official or community recommended wallets!
Wallets will generate a secret key that will in turn be used to generate a public key, like the examples above. This is the address you give out to other users to be sent cryptocurrency and that you will need to give us to be paid.
Wallet software will provide a backup key also known as a "seed"- a long series of words (usually 12-24) that can be used to re-create your secret key.
IT'S VERY IMPORTANT YOU ALWAYS KEEP A SAFE COPY OF THESE WORDS AND NEVER SHARE THEM WITH ANYONE, TAKE ANY PHOTOGRAPHS OR SHARE THEM ONLINE.
Your backup passphrase is vital to the security of your coins and losing it or having it become public means you could lose your coins or have them stolen!