Do I have to pay Google?

Google provides a free quota of 4 million characters every month. If your website consumes more, then each next million characters will cost $4. Here is Google Pricing. In the Google settings, there are quotas for dropping money from the card, and you can set them to $0. And when the free characters quota ends, the plugin will stop working until next month. If your site is small or medium in terms of content and traffic, most likely you will have enough free quota. But if your website has hundreds of publications, you have to pay Google.