Hi there! I have an job interveiw on Thursday and I need some info.
The position is with a large retailer (called XYZ), and the role of
the position is to sell advertising time on instore media to vendors
and non-vendors (i.e companies that have no sales relationship with
XYZ) Here is my question:
I need to understand typically how XYZ will approach a company to
offer advertising. I believe larger companies hire agents to do all
thier advertising, would XYZ approach these agencies? Any information
with this regard will be useful. Please also keep in mind that some of
the potencial advertisers will be smaller companies.
I need this information in the next 28 hours, otherwise it is not as useful to me.
Thank you!!

Often called "co-op advertising".
For instance, a grocery store that puts advertisements on the shopping
carts, right?
I am guessing that the following occur--no I have NO real idea, but a
very SLIGHT background in it.

--The company that sells the shopping carts to the store can provide vendors
--The vendors themselves already have programs in place and will approach you
--I doubt that the agency would exist in this instance, unless you
consider the shopping cart supplier as an agent

Agencies, to my knowledge, only exist for heavy front-end advertising.
That means that little cards that go into shopping carts aren't heavy
front-end, you know? That's pocket change to the commercial that airs
during the superbowl.

Thank you for your comment. The advertising i am referring to worth
around $60,000 per 30seconond ad, which is run at least 15 times/day
on a one hour loop.
Any additional info anyone may have is appreciated.