Latest Trend on Meta Tags

Title , Description & Keyword Tag

[seo_works]

Can anyone throw light on Latest Trend on Meta Tags.

Thanks

[coopster]

Welcome to WebmasterWorld, seo_works.

Perhaps these recent threads will shed some light:
META tags -- Should we be using these? [webmasterworld.com]
Meta tags -- Which ones to use [webmasterworld.com]

[seo_works]

Thanks mods.. i just read those thread n it does clea some pic.
I was wondering, does commas, n special character should be added in meta tags or not especially in Title Tag coz there seems diff norms for diff SE's.