At times like this when you just want a quick definition - the lexicon comes in correct handy.  Network marketing is a playing in which a distributor meshwork is needed to build the business. Usually much businesses are also MLM in nature (payouts also occur at more than one level). Network Marketing is sometimes also used incorrectly to inform the playing uses a meshwork of product suppliers to offer a broader selection of products. It's usually used this artefact to differentiate themselves as a artefact to suggest their information is superior to other much programs.  Clear as mud?

Okay let's go at it from added angle. If you're participating in an organization where you are actively trying to promote a product to just most everyone you can think of and you're told to get/sponsor grouping under you - you're participating in meshwork marketing.  And, these questions will likely ring some very loud bells for you.
Detest bugging your family, friends and grouping who fervently praying you won't bring up your 'business' opportunity?  Cringe at the mere thought of 'following up' with your massage therapist after putting her on a third party call to explain your opportunity?  Ever wished you could just carry on a conversation with someone without constantly thinking of ways to recruit them? Sick of being told  \"Do more of it!' and you don't know what you're supposed to be doing more of?  Tired of hounding grouping you know couldn't care less most your business?   If you answered yes to these questions, you're participating in meshwork marketing.
The biggest thing you'll hit issues with is HOW you're supposed to get \"leads\" to buy what you're offering.  It involves your enroller (your upline) and your recruits (your downline).  The upline is tells you what to do, how to do it - sort of.  Uplines don't always tell you everything you REALLY need to know.  I.E. buy your leads for .74 cents (but you hit to buy 200) Things are not what they appear to be.  Hang in or bale?  Only experience will help you make up your mind.