In the advanced era of technology literally anyone with a stable access to the internet can buy bank logins today (active credit card numbers with cvv, cvv2 number on debit card, cvv number on capitec debit card), so they can be used to hack into personal debit or credit accounts of any citizen of the world and illicitly withdraw money from there or just play around buying expensive or not so expensive stuff for oneself, just to basically continue the chain of rampant consumerism that engulfs us all.
In the clandestine world of carding cvv full makes reference to the data withdrawn from a credit card, which comprehends card number, expiration date (cvv number on visa debit card, cvv on visa debit card, testing visa card numbers with cvv), card holderТs name as a minimum that can only be used on the online transactions only in opposition to the dumps, which is data about the credit card encrypted at the back of a credit card and which can be used to forge it.
Cvv checker is a necessary tool for any carder or buyer, because not even the most reputable dumps and cvv online shop can guarantee that you are not shaking hands with a ripper (full form of cvv in visa card, credit card cvv2 number, cvv full name debit card). So in order to save oneself the trouble of lamenting afterwards, the best idea is to run a test on the online checker, which is usually available at any carding website, before any transaction.
There are two main terms in carding that any novice carder is aware of, but maybe does not clearly understands the difference, those terms are cvv and dumps. Basically, dumps is referring to the data encoded on the magnetic band of a credit card and usually consists of a series of numbers that can be then overlaid on a real plastic card for forgery (working credit cards with cvv, bank card cvv number, credit card for testing with cvv), whereas you can only use cvv online.
Once a crafty carder buys the dump credit card details are generally transferred on a fake piece of plastic with the aim to imitate a real credit or debit card, so then it can be used for in-store purchases. Nevertheless, it is much easier to use this data online, because the probabilities of being caught on the internet are much lower than in a real brick and mortar store (carding cc to btc, credit card and cvv numbers that work, visa credit card cvv).