What is a “captcha” today even a schoolboy knows. But “why” - site owners are well aware.
Any captcha is a double-edged sword. A complex captcha protects well against spam robots, but it also prevents customers from sending an application or order. Simple - on the contrary, it is convenient for people and vulnerable to robots.
To the rescue, with the motto “Just for people, difficult for robots”, hurries Google reCapthca .
Looking ahead, I’ll say that we’ve made our cool / universal / non-programming module to replace the standard captcha with reCaptcha .
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