Hi @wpsf044 thank you for reaching out. Site Kit is the official WordPress plugin from Google for insights about how people find and use your site. With Site Kit you can connect and display data for Google services such as Search Console, Analytics, AdSense, Tag Manager and Google Ads. All data is displayed via the Site Kit dashboard to give you a helpful overview of all your stats in one place.
The Plugin for Google Reviews is a separate plugin that displays Google business reviews on your site and is not connected with Site Kit. This plugin provides a different service so it’s entirely up to you whether you keep this on your site or not but Site Kit does not display Google business reviews so if you would like to do this then I’d suggest keeping this plugin installed alongside Site Kit.
If you do see any issues in your Site Kit dashboard or settings while using the Plugin for Google Reviews then please do let us know and we will be happy to help assist you with those. You can also find much more information on Site Kit along with useful guides and troubleshooting tips at our documentation site.
I hope this helps to answer your question but if you need anything else then please don’t hesitate to ask.