Step 1: Create a Google project and an API key
Please watch the video below to know how to create an API key for this Google Place Reviews WordPress plugin, then scroll down this page to set up billing account for this Google Service.
Step 2: Set up billing account
On July 16, 2018, Google pricing plan went into effect for Maps, Routes, and Places. But don’t worry, they give each account an amount of $200 free each month, regular usage of this plugin falls under that amount so you don’t have to pay for any fee. All you need to do is filling a billing account and setup the budget so you’ll not be charged.
Please go to https://cloud.google.com/maps-platform/ , click on “GET STARTED” ,
tick on Maps and Places, click on continue, select the project in which you create the API key for this plugin and follow the guide.
Go here https://cloud.google.com/billing/docs/how-to/budgets to set budget $0 so you’ll not be charged.
In case you want more than regular requests (of budget $200 free) and willing to pay, you can set any budget you want.
If you want to limit requests, you can refer to this setting