Next, select 'Invisible reCAPTCHA', add our domain, then register the website with the captcha mechanism.
Now you need to generate the API keys. Click on the name of the website.
Copy Site Key and Secret Key.
Go to your project on Tilda. Go to Site settings > Forms > General form settings > Activate spam filter. Enter the Site key in the Key for reCaptcha field, then add the Secret key to the Secret key field.
Save changes and republish the pages containing the form.