# Captcha

## ✅ What is a captcha ?

ngSurvey uses Google's invisible Captcha system to prevent access to bots and automated systems. 

{% hint style="warning" %}
The captcha security item requires that you have setup Google's Captcha in your account or [system settings](https://docs.ngsurvey.com/installation-setup/system-settings/google).
{% endhint %}