CAPTCHAs are tools you can use to differentiate between real users and automated users, such as bots. It provides challenges that are difficult for computers to perform but relatively easy for humans.
Now on tiger you can enable this setting to ensure added layer of safety and integrity of platform by following few simple steps. We use google captcha system

Captcha can be enabled by admins by going to admin dashboard settings> Google Recaptcha> Enable Recaptcha for Emails and Sign Up

Learn how to setup Captcha through the following tutorial