Usage patterns
いろいろな〈物〉various kinds of (things)
The shop has all sorts of products lined up.
いろいろ〈動詞〉to do (something) in various ways
He looked into it in various ways before deciding.
〈事〉のいろいろthe various aspects of (something)
We talked about the various aspects of child-rearing.
いろいろとお世話になりましたthank you for all your help with various things
Thank you for all your help over the past year.
Expressions
いろいろあってwhat with this and that; for a number of reasons