Please do not post topic lines in all caps – it’s considered yelling and you were already asked once not to do this.
http://codex.wordpress.org/Forum_Welcome#The_Bad_Stuff
An excellent article on meta tags here: http://www.metatags.org/meta_name_robots
(…not affiliated in any way with this site)
i already know that where these data is to be pasted(is it header.php)
Put them after the title in your theme’s header.php
Another reference: https://support.google.com/webmasters/answer/79812?hl=en