From where can i get google map component plugin?
From the app market I downloaded it, but the zip doesn't contains the plugin.
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If you're on prem, follow the steps in the documentation. If you're on cloud, go to the Admin console and search for the plugin, as states in the documentation.
The zip that you download from the AppMarket is the component plug-in itself. If you have an on-premise environment copy the ZIP to your plugins folder. If you are on a cloud environment you can deploy the component from the Admin console.