Head over to Facebook developers page & click on create a new app Select the kind of app you are using. For configuring WordPress plugin, it’s usually websites. On the next page give a name to your app. Make it relevant or if you are testing this right now, call it test app. Click on Create new Facebook App Id. In the pop-up select the category for the app. Click on create app ID. On the next page click on Skip at the top right & you will be taken to your created App page, where you can retrieve your app id & secret key. Click on show in front of App secret, and you need to enter your Facebook account password to see the App secret key. Now copy-paste the App ID & App secret values in the plugin or tool that you are configuring.