Addy is CT speak for address, which in turn is CT speak for your account number, not your location. Cryptographically speaking, your addy is your public key and the part you can normally safely send to someone that wants to send you funds.
This is also referred to as your wallet address.
The other part that actually controls the coins “in” your wallet/addy/public key is your private key. This is the one that literally is the key to your funds and therefore the part that hackers try to steal from you.
Note that separate blockchains have separate addys. Don’t send coins from Blockchain A to an addy from Blockchain B. Hopefully MetaMask and other wallets will finally implement safeguarding features to prevent this and other self-rugs.
See also Not Your Keys, Not Your Coins.
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