What is the blue letter verification code for?

The Lanxin verification code is used to ensure that you are logging in and your account has not been stolen by others. CAPTCHAs can be used to prevent web crawlers and bots, participate in online voting and prevent the spread of spam and other people's misappropriation. Nowadays, SMS verification codes are not only used by users to verify their identities, but also help major websites/apps reduce illegal registrations, repeated registrations, etc., and they are widely used in e-commerce websites, online banking, app software, etc., which not only It can ensure the security of personal information and greatly improve the management efficiency of enterprises. It can also be said that SMS verification codes play an important role in our lives.