Can we use iframe in item description to show full webpage there
No, it will not work.
Any other way to achieve it?
No! you can’t.
So is there any way to animate the description?
you can use gif animation image.
no! it also will not work in item page.
Ohh, does meta tags work?
in item page you are not creating a new page, just you are trying to describe your item features and functionality. So, how you will get options to add meta tags!
In your item already has options to add tags, you will get this options when you will submit any item or will go to edit any existing item.