What is the purpose of checking the "I'm not a robot" box?

In certain places on Twoosk Marketplace you will be asked to click a checkbox to confirm I'm not a robot, for example on the 'Create Account' page, or 'Reset Password' page.

This is used to protect and secure websites against spam and abuse, preventing data from being sent by a machine or program impersonating a page user.

The “I’m not a robot” checkbox clicker is the most common reCAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) Turing test to tell humans and bots apart.