Hello Pacifier. As much as I love this mod, I wish you incorporate the following the new version, whenever you're planning for that
1) Static description meta tag for the home page, as using this mod leaves the forum home page without the description meta tag, which is not good.
2) Description meta tag for forums and sub-forum pages.
3) Keywords-Though I've read that keywords are less important, it wouldn't harm

Thanks,

1- you can add one in your index template.
2- you can do that too. just add the content of the meta tag you want in the forum description
then add a new meta tag in your forumdisply template like that.
<meta name="description" content="{$foruminfo['description']}" />
3- am not sure..

Many thanks ! I'm sure this will help many like me who aren't code savvy. Thanks again

Well u can add a mod which is called Dynamic Metas

Adds dynamic meta field (keywords and description)
Version 1.0 by CrazyCat