We recommend enabling Google reCAPTCHA integration in order to avoid spam messages and spam accounts. See the instructions below.
1-) Go to Googe ReCAPTCHA website: https://www.google.com/recaptcha/intro/v3.html
2-) Click the Admin Console button
3-) Fill in the requested information. For the reCAPTCHA type, make sure to select reCAPTCHA v2 - I'm not a robot option. The domain must match with the domain name of your website.
3-) Click the Submit button and copy the Site Key and Secret Key
4-) Return to your site manager. Go to Configuration -> Google Integration. Select the Google ReCAPTCHA tab. Paste the Site Key and Secret Key and save changes.