What is SMS check code?

In order to ensure the security of website customization service or online shopping payment, the background of the website will send a short message to the mobile phone with the user's mobile phone number pre-bound, and there will be a set of numbers in the short message, which is the verification code.

Because the check code is sent to the designated mobile phone number, the subsequent operation can only be completed by inputting the correct check code. The check code can verify whether the operator is the owner himself, which is a good security strategy.