Hello,
I checked my site in google.then i saw my sitename & title is OK but site description is this ------Icy Phoenix is an highly customizable CMS based on phpBB which allows you to create a dynamic site with a lot of features for powering web communities. -----

how do i change to this site description?
how do i change  my meta tags?

open your language\lang_english\lang_main_settings.php

find and see this (here you can change it

dont change anything else in this line exept this writed in red

Tip.you can do it also for other lang_xxxx

____________
We are the phpBBorg. Lower your Crackers. Your phpological and forumological distinctivness will be added to our own. Resistance if futile!

And you are allowed to change any and all information in that file.

____________
| Icy Phoenix ColorizeIt! |
Bipolar Disorder - Not good for you and definitely not good for everyone else.

in ACP theres also a meta option in server config. there you can change that aswell

____________
Out of Order