You will need to enter your keys under Tools - Change Parameters - Tags,Keys&Code tab as shown below

How to Generate Google reCAPTCHA Keys

Visit this page https://www.google.com/recaptcha/admin

The images below show the keys you will need to generate 

reCAPTCHA V2

Once you click Register, you will be given the set of keys you will need to enter in your freshadmin store settings for every store you are running.

 

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