No doubts today all of internet users are aware of what Captcha is and what it is used for. Briefly, it is a test that helps to determine whether a user is a robot or not. The main reason for the Captcha necessity is the protection of the website`s registration pages, prevention of comment spam in blogs, avoidance of worms, and spam in email.
If your website requires protection from abuse, it is suggested that you use a Captcha. There are many Captcha implementations, and they all do the thing they were constructed for. Today we will examine what the difference is between WordPress plugins that provide Captcha`s implementation opportunity, and what are their pros and cons.