After successful registration, You will get 2 unique keys such as Site key & Secret key. After Getting all keys you need to use those keys to add Recaptcha into form as well as you will need to add api script which you will get from same.
# In Markup
In order to integrate Recaptcha into your HTML/Bootstrap form you need to follow these points:
1. Firstly, you need to include <div class="g-recaptcha" data-sitekey="site key"></div> in your form (replace the site key with your own key)
2. Then include, the Google ReCaptcha api to initialize ReCaptcha on your form — <script src='https://www.google.com/recaptcha/api.js'></script>
3. I also use data-callback and data-expired-callback attributes on the g-recaptcha div — these are optional and I will use them to make ReCaptcha cooperate with the validator
Here is the structure of Bootstrap form where you will need to place Recaptcha
Follow all steps and you are done. Also, you can Download Source code or View Demo. Link given below