Why do you need two verification codes to buy traffic on Taobao?

To buy traffic on Taobao, you need to verify two verification codes, mainly for security reasons. Verification code is a visual or auditory cue for identifying human users and computer programs, aiming at distinguishing normal users from malicious automated programs (such as robots). By requiring the user to input the verification code, the purchase behavior can be ensured to be completed by real human users, thus preventing the illegal use or attack of malicious programs.

One of the common forms of verification code is graphic verification code, which requires users to select pictures related to prompt information from a group of pictures. This can effectively prevent automated programs from bypassing the detection of verification codes through simple text recognition methods.

Another kind of verification code may be SMS verification code, which requires the user to input the dynamic password received by SMS. This kind of verification code is usually used to verify whether the user's mobile phone number is true and valid, and further improve the security of purchase behavior.

By using two verification codes, Taobao can improve the security of purchase behavior, ensure that the transaction is true and effective, and minimize the occurrence of fraud and malicious behavior.