What are the "inline tags" ? How to create new tags when importing feed ?

Hi all,

I want the new tags to be created in my blog when importing an rss feed.
I already have activated “Create new Tags to match them” in the “Categories” topic.

Where should these tags be put (description, content) ? What are the “inline tags”?

Thanks in advance,
Tom

http://wordpress.org/extend/plugins/feedwordpress/