This feature allows you to add Google reCaptcha into Checkout form of OS Services Booking. To setup Google reCaptcha, you need to follow these steps
1. Register reCaptcha keys
To use Google reCAPTCHA v2 for your Joomla website, you must first register your domain with the reCAPTCHA API and get the site API key & the site secret API key. The API key pair is unique to each domain and first-level subdomains that you specify. These are free to get from Google if you have a Google account already. Check this site to get your own reCAPTCHA API keys: http://www.google.com/recaptcha/admin.
Here is a screenshot of the new site registration page for Google reCAPTCHA.
You need two pieces of information from Google reCAPTCHA site:
2. How to use reCAPTCHA in OS Services Booking
You can easily use reCAPTCHA inside Joomla:
The second main step is to set reCAPTCHA as the default captcha globally in Joomla.
3. Select reCaptcha option in OS Services Booking Configuration
You can go to OS Services Booking Configuration page > Tab: Form Fields, and select option Yes (use reCaptcha) in field Show Capcha in the booking form