What is the use of delete text?

Answer 1

del tag make a line through the text which mean : this text is no longer used but don't think that the text will disappear from the web page , no . but almost followed by ins tag which mean : we are using this text instead .
I hope you got it .

Answer 2

deleting the text from the page...

Answer 3

Highlighting

Answer 4

okk thanx