What is viral marketing?

I have heard that viral marketing helps in achieving marketing objectives and increase brand awareness.How it helps in achieving the marketing objectives and what is the strategy it follows?

Viral marketing is any marketing technique that induces Web sites or users to pass on a marketing message to other sites or users, creating a potentially exponential growth in the message's visibility and effect.

Viral marketing is a buzzword for promotional messages that spread through social networks.

Viral marketing is any marketing technique that induces Web sites or users to pass on a marketing message to other sites or users, creating a potentially exponential growth in the messages visibility & effect.

Viral marketing is a way that you can promote your brand. It includes these activities: website, content marketing, video marketing, email marketing, SMS marketing, ...

Viral marketing, viral advertising are buzzwords referring to maketing techniques that use pre-existing social networking service and other techologies to produce increase in band awareness or to achieve other marketing objective.

There is detailed info about Viral marketing at wikipedia. You should visit it to know detailed info about viral marketing.

Viral marketing is consider that a new user start his own product to promote with known person or customer and invite them to pass your information on to their friends with same interest. Like as You post a video on youtube and seen by person then he send to others via whatsup, face book or posted elsewhere. They just keep sending it.

viral marketing is so called because it tends to spread in an exponential :
from 1 to 10, from 10 to 100 , and so on ...
There are multiple ways and only the imagination is the limit.
but all the base and offer an incentive for the user to spread it .
This incentive may be economic in nature :
-
For example, a report of your own product for sale with the affiliate link of the user who downloaded
it will be an incentive to turn to give it away to spin your link
while you do turn your report -

or else it can be viral for fun , curiosity , etc.
For example, a funny video :

create a funny video and enter it in your link ( in the video)
if it is it will follow very welcome from user to user , and so also your link , site I produced .

or else a video game with your free advertising
but it can also be
a plugin,
*software
etc. .


a method much in vogue and that said forced matrix
that is, to participate you must first interact with it
for example :
watch the site for users to number of seconds (eg 5 sites) after you enter your site among the 5 people who want to get even will see your
if those who sign up other affiliates they will also find your , and so on ....
one of them is free viral but there are many just do a search

A form of marketing that helps you go viral with websites, searches, promotion and so on.