[ad_1]
Hi @icemanau,
Yes, right, to make the reviews auto updateable you should have your own Google API key. Extremely detailed manual how to create API key is placed on the page in wp-admin: Google Reviews / Support / Full Installation Guide, after creating you need to save it on the Settings page.
It should cost nothing. Google is currently giving $200 free credit a month and it should be enough to use the plugin for connecting several Google places without additional fees except this free $200 credits.
Thanks!