Marketers are like every other group, trying to use buzzwords to make themselves sound important and knowledgeable. Using words that other people don't understand must mean that you know what you're talking about, right? As Daddy used to say, "hogwash!"
Most of marketing is common sense. At its core it's about communicating what you have to offer in a way that makes other people want it and reinforces your value – whether that's in a product, a service, or your own personal expertise.
Everybody is a marketer, though, not just business marketers! A couple of real world examples of how everyday people market:
Anyone who's ever been on a date knows they should dress nicely, be charming and interesting, and be on their best behavior. That's marketing.
A child trying to convince his parent that he needs this toy or that game is marketing heavily. One thing kids learn how to create very early on is "urgency." Sometimes it's through persuasive talk, but if all else fails they can always pull out the crying card (a tactic not recommended in business).