What does {{ hiddenInput('enabled', '1') }} in an entry form do? What's the purpose of {{ hiddenInput('enabled', '1') }} in an entry form?

&lt;form method="post" accept-charset="UTF-8"&gt;
{{ csrfInput() }}
{{ actionInput('entries/save-entry') }}
{{ redirectInput('viewentry/{slug}') }}
{{ hiddenInput('sectionId', '2') }}
{{ hiddenInput('enabled', '1') }}
It is to generate an HTML input tag with type of hidden.
This will not appear on the screen like a normal input does. 
For more information related to input type hidden, you can refer to this.

enabled means that the entry will be saved with its status toggle set to the “enabled” (green) position.