What does form action="" mean?

Answer 1

The form will submitted to that same url that rendered it.
That is the same as not including the action attribute.

Answer 2

I think this might be helpful as someone already asked this.

https://www.sololearn.com/Discuss/2220709/?ref=app

Incase its not clear don't hesitate to show your disatisfaction.

Answer 3

The url is not there so what is the significance of ""