You can ask your clients to give feedback about your product through your Google Plus profile. You need to have Google Plus profile to do that. You can redirect users to your Google Plus profile just by adding “?hl=en&review=1” after the URL.
Sample URL – https://plus.google.com/104588473734084240116/posts?hl=en&review=1
But the user should be logged in to Google Account to do the action.
Reference Article – https://www.webworksofkc.com/blog/get-more-google-business-reviews-by-giving-customers-a-direct-link/