Marketing is a minefield of "biz-speak".

A product offering is not only the thing but the way it is presented, packaged, marketed,... It could even refer to a range of related products. I wouldn't say it has anything to do with making it yourself.

Structured could have to do with setting price points, profit margins, etc., for example do you lose money on the razor handle and make it up on selling the refill blades. For an array of products, it could deal with how the different products in the range relate to each other, for example do you have products in the offering that appeal to different demographic groups or is it "one size fits all".