From http://www.w3schools.com (Copyright Refsnes Data)

HTML 5 <ins> tag

Definition and Usage

Defines text that have been inserted in addition to the rest of the document.

Differences Between HTML 4.01 and HTML 5

NONE

Tips and Notes

Tip: Use it together with the <del> tag to describe updates and modifications to a document.

Example

Source	Output
My favourite car is a <del datetime="2002-05-05">Volvo</del> <ins datetime="2008-01-28">BMW</ins>	My favourite car is a ~~Volvo~~ BMW

Attributes

4: indicates if the attribute is defined in HTML 4.01
5: indicates if the attribute is defined in HTML 5

Attribute	Value	Description	4	5
cite	URL	A URL to another document which explains why the text was inserted	4	5
datetime	YYYYMMDD	Defines the date and time when the text was inserted	4	5

Standard Attributes

class, contenteditable, contextmenu, dir, draggable, id, irrelevant, lang, ref, registrationmark, tabindex, template, title

For a full description, go to Standard Attributes in HTML 5.

Event Attributes

onabort, onbeforeunload, onblur, onchange, onclick, oncontextmenu, ondblclick, ondrag, ondragend, ondragenter, ondragleave, ondragover, ondragstart, ondrop, onerror, onfocus, onkeydown, onkeypress, onkeyup, onload, onmessage, onmousedown, onmousemove, onmouseover, onmouseout, onmouseup, onmousewheel, onresize, onscroll, onselect, onsubmit, onunload

For a full description, go to Event Attributes in HTML 5.

Try-It-Yourself Demos

Deleted and inserted text
How to mark deleted and inserted text in a document.