1. Make sure you have the Drupal 8 core Contact module enabled. If not, go to "Extend" in the administration menu, find the "Contact" module, and enable it.
1. After installing the CAPTCHA module, go to "Configuration" in the administration menu, and then click on "CAPTCHA" under the "User interface" section.
3. Once you have the keys, enter them in the appropriate fields on the CAPTCHA configuration page.
1. Next, go to "Structure" in the administration menu, and then click on "Contact form."
2. Choose the contact form you want to protect with a CAPTCHA (usually the "Website feedback" form).
3. Click on the "Edit" button next to the chosen contact form.
4. Scroll down to the "Form settings" section, and you should now see a "CAPTCHA" field. Select the CAPTCHA type you configured earlier (e.g., reCAPTCHA).
5. Save the settings.
2. Submit the form and ensure that the CAPTCHA works correctly.
Congratulations! You have successfully added a CAPTCHA to your Drupal 8 contact form. This will help protect your contact form from spam submissions and enhance the overall user experience by ensuring that only legitimate users can access it.