The target attribute specifies a name or a keyword that indicates where to display the response that is received after submitting the form.
The target attribute defines a name of, or keyword for, a browsing context (e.g. tab, window, or inline frame).
From Tag with a target attribute:
<form target="_blank">
Attribute Values
| Value | Description | 
|---|---|
| _blank | The response is displayed in a new window or tab | 
| _self | The response is displayed in the same frame (this is default) | 
| _parent | The response is displayed in the parent frame | 
| _top | The response is displayed in the full body of the window | 
| framename | The response is displayed in a named iframe | 
Note: The target attribute was deprecated in HTML 4.01. The target attribute is supported in HTML5.
Frames and framesets are not supported in HTML5, so the _parent, _top and framename values are now mostly used with iframes.