To effectively protect your site from spam, it is best to use reCAPTCHA
To install, you need to take several steps:
To register, go to the address https://www.google.com/recaptcha and fill in all the necessary fields.
After you have registered, you need to add your site, for this in the upper right corner click on "+"
In the window that opens, enter your data, site address, version of reCAPTCHA, write the domain name of the site and click "Submit"
This completes the registration process.
Next, go to the settings (gear icon in the upper right corner)
In the window that opens, the public and private keys will be shown
The first step has been completed.
Next, you need to copy each key individually and paste them into the admin panel of your site.
To do this, go through "Configuration / My Store"
and paste these keys into the required fields
Save and activate the reCAPTCHA function all
The reCAPTCHA installation process is complete.