Outdoor Advertising
Billboards, Digital Signage,  Skywriting, Bus Advertising
Napa Valley, San Francisco North Bay, Ca. USA

Outdoor advertising or Out-of-home advertising

(also referred to as OOH) is essentially all type of advertising that reaches the consumer while he or she is outside the home.

This is in contrast to broadcast, print, or internet advertising, which may be delivered to viewers out-of-home (e.g. via tradeshow, newsstand, hotel lobby room), but are usually for home or office viewing. Outdoor products are divided among three primary categories: Billboards, street furniture and transit. The most common product in OOH is the billboard. OOH encompasses outdoor advertising but extends to the indoors as well (such as ads in malls).

This is a non-exhaustive list. There are virtually no limits to shape and size of out-of-home advertising media.

for instance: beside the above one can use Digital Signage, Point of sale display, Flyer, Neon signage
Sides of buses, Skywriting

Also See:

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