Hello !
I'd love to such a function. That is, people brought some description for the ad, and the plugin would treat the text and drew from him the most likely keywords for this description. And save it in the meta keywords field. Accordingly, the meta description on this same principle would AutoFill ...

on the Internet, I have seen some services that do this ... here for example: http://tagcrowd.com/

@Philt
- Meta description must be readable and clean, it cannot be group of keywords
- Osclass itself generate meta title and meta description by default