The definition of an advertisement is: a paid announcement.
The announcement can be of anything including goods or services for sale, events, etc. Advertisements come in various mediums:
Print - newspapers, magazines, billboards
Digital - display, pay-per-click, email, text messaging
TV - commercials, sponsorships
Radio - commercials, sponsorships
Exhibiting - trade shows, sponsoring events, promotional products
The puropse of loaded words in advertisements is to
create an image
compare two unlike things
influence the reader. illustrate bias