A good tool to have on your website is a ReCaptcha for your website forms. This helps a great deal in combatting automation scripts and bots.
Google ReCaptcha is a simple way to integrate recaptcha to your forms. You can read more about this topic here. When adding a new site to your Google ReCaptcha you will be given two keys:
You'll need both when implimenting Google Recaptcha on your website.