What are the Default, System and Microsoft LogLevels in ASP.NET Core
<p>The default project template has the following logging configuration in <code>appSettings.json</code>:</p>

<pre><code>"Logging": {
  "IncludeScopes": true,
  "LogLevel": 
    "Default": "Debug",
    "System": "Information",
    "Microsoft": "Information"
  }
}
</code></pre>

<p>What are <code>Default</code>, <code>System</code> and <code>Microsoft</code> for?</p>