A Captcha is a security code (sequence of characters) to be copied by visitors in order to validate user-generated information, such as a form. This prevents spam and verifies that a human and not a robot is filling out the form.
To enable the Captcha, access Settings at the bottom of the editor's left column.
And then, click on General.
- Click on the 'No' button to enable the 'Yes' button;
- Click on 'Save'.