Problem with portal description in Google search results

[Luca kk，修改在11 年前。]

Hi all,
when I make a search of my portal in google I get
my portal link with sub description:

Your browser does not support inline frames or is currently configured not to display inline frames. Content can be viewed at actual source page: ...

I use a IFrame elemnt into my homepage.

How do I avoid this description and custom it with mine?

Thanks in advance.