The viral marketing campaign for The Dark Knight was highly effective and engaged fans through various online activities and real world events. It started with websites promoting Harvey Dent that eventually revealed the Joker, and expanded to events at Comic-Con involving puzzles and clues. The campaign utilized existing online networks and communities to spread its messages and images, taking advantage of people's desire to share and spread exciting new information about the film. It provided an immersive experience for fans while generating huge buzz and interest leading up to the film's release.

1. Viral Marketing

2. Huh?
You have to admire the virus. He has a way of living in secrecy until he is so
numerous that he wins by sheer weight of numbers. He piggybacks on
other hosts and uses their resources to increase his tribe. And in the right
environment, he grows exponentially. A virus doesn't even have to mate --
he just replicates, again and again with geometrically increasing power,
doubling with each iteration:
1
11
1111
11111111
1111111111111111
11111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111111111111
In a few short generations, a virus population can explode…

3. Viral Marketing Defined
What does a virus have to do with marketing?
Viral marketing describes any strategy that
encourages individuals to pass on a marketing
message to others, creating the potential for
exponential growth in the message's exposure and
influence.
Like viruses, such strategies take advantage of rapid multiplication to
explode the message to thousands, to millions.Off the Internet, viral
marketing has been referred to as "word-of-mouth," "creating a buzz,"
"leveraging the media," "network marketing." But on the Internet, for better
or worse, it's called "viral marketing." While others smarter than I have
attempted to rename it, to somehow domesticate and tame it, I won't try.
The term "viral marketing" has stuck.

4. The Classic Hotmail.com Example
The classic example of viral marketing is Hotmail.com, one of the first free
Web-based e-mail services.
The strategy is simple:
1.Give away free e-mail addresses and services
2.Attach a simple tag at the bottom of every free message sent out: "Get
your private, free email at http://www.hotmail.com"
3.Then stand back while people e-mail to their own network of friends and
associates
4.People see the message
5.They Sign up for their own free e-mail service
6.Propel the message still wider to their own ever-increasing circles of
friends and associates.Like tiny waves spreading ever farther from a single
pebble dropped into a pond, a carefully designed viral marketing strategy
ripples outward extremely rapidly.

5. Elements of a Viral Marketing
Strategy
Accept this fact. Some viral marketing strategies work better than others,
and few work as well as the simple Hotmail.com strategy. But below are
the six basic elements you hope to include in your strategy. A viral
marketing strategy need not contain ALL these elements, but the more
elements it embraces, the more powerful the results are likely to be. An
effective viral marketing strategy:
1.Gives away products or services
2.Provides for effortless transfer to others
3.Scales easily from small to very large
4.Exploits common motivations and behaviors
5.Utilizes existing communication networks
6.Takes advantage of others' resources
Let's examine at each of these elements briefly.

6. Gives away valuable products or services
"Free" is the most powerful word in a marketer's vocabulary. Most viral
marketing programs give away valuable products or services to attract
attention. Free e-mail services, free information, free "cool" buttons, free
software programs that perform powerful functions but not as much as
you get in the "pro" version.
Wilson's Second Law of Web Marketing is "The Law of Giving and Selling"
(http://www.wilsonweb.com/wmta/basic-principles.htm). "Cheap" or
"inexpensive" may generate a wave of interest, but "free" will usually do it
much faster.
Viral marketers practice delayed gratification. They may not profit today, or
tomorrow, but if they can generate a groundswell of interest from
something free, they know they will profit "soon and for the rest of their
lives" (with apologies to "Casablanca").
Patience, my friends. Free attracts eyeballs. Eyeballs then see other
desirable things that you are selling, and, presto! you earn money. Eyeballs
bring valuable e-mail addresses, advertising revenue, and e-commerce
sales opportunities. Give away something, sell something.

7. Provides for effortless transfer to
others
Public health nurses offer sage advice at flu season: stay away from people
who cough, wash your hands often, and don't touch your eyes, nose, or
mouth.
Viruses only spread when they're easy to transmit. The medium that
carries your marketing message must be easy to transfer and replicate: e-
mail, website, graphic, software download. Viral marketing works famously
on the Internet because instant communication has become so easy and
inexpensive.
Digital format make copying simple. From a marketing standpoint, you
must simplify your marketing message so it can be transmitted easily and
without degradation. Short is better. The classic is: "Get your private, free
email at http://www.hotmail.com." The message is compelling,
compressed, and copied at the bottom of every free e-mail message.

8. Scales easily from small to very
large
To spread like wildfire the transmission method must be rapidly scalable
from small to very large. The weakness of the Hotmail model is that a free
e-mail service requires its own mail servers to transmit the message.
If the strategy is wildly successful, mail servers must be added very quickly
or the rapid growth will bog down and die. If the virus multiplies only to kill
the host before spreading, nothing is accomplished.
So long as you have planned ahead of time how you can add mail servers
rapidly you're okay. You must build in scalability to your viral model.

9. Exploits common motivations and
behaviors
Clever viral marketing plans take advantage of common human
motivations. What proliferated "Netscape Now" buttons in the
early days of the Web? The desire to be cool. Greed drives
people. So does the hunger to be popular, loved, and understood.
The resulting urge to communicate produces millions of websites
and billions of e-mail messages. Design a marketing strategy that
builds on common motivations and behaviors for its transmission,
and you have a winner.

10. Utilizes existing communication
networks
Most people are social. Nerdy, basement-dwelling computer science grad
students are the exception. Social scientists tell us that each person has a
network of 8 to 12 people in their close network of friends, family, and
associates. A person's broader network may consist of scores, hundreds,
or thousands of people, depending upon her position in society. A
waitress, for example, may communicate regularly with hundreds of
customers in a given week. Network marketers have long understood the
power of these human networks, both the strong, close networks as well
as the weaker networked relationships. People on the Internet develop
networks of relationships, too. They collect e-mail addresses and favorite
website URLs. Affiliate programs exploit such networks, as do permission
e-mail lists. Learn to place your message into existing communications
between people, and you rapidly multiply its dispersion.

11. Takes advantage of others'
resources
The most creative viral marketing plans use others' resources to
get the word out. Affiliate programs, for example, place text or
graphic links on others' websites. Authors who give away free
articles, seek to position their articles on others' webpages. A
news release can be picked up by hundreds of periodicals and
form the basis of articles seen by hundreds of thousands of
readers. Now someone else's newsprint or webpage is relaying
your marketing message. Someone else's resources are depleted
rather than your own.

12. Why The Dark Knight's Viral Marketing is Absolutely Brilliant
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13. Why The Dark Knight's Viral Marketing is Absolutely Brilliant
“I Believe in Harvey Dent.”
“Why So Serious?”
These are two phrases that have stuck with us over the past year. They really showcase
how The Dark Knight marketing unfolded–it was a two-fold approach and both sides of this
viral marketing tool worked wonders.
Before The Dark Knight, viral marketing was kind of a joke. Yes, websites were devoted to
various projects like Cloverfield. I remember the legit website for the memory-erasing
company in Eternal Sunshine of the Spotless Mind. The viral marketing of old served as just
a clever ploy to start marketing a film, but few people really took notice. The Dark Knight
marketing got people involved. Granted, the people that got involved were probably those
who were going to see the movie opening weekend anyway, but MY GOD was it fun.

14. Time-line for The Dark Knight viral
marketing
In May 2007, the firm handling the
marketing, 42 Entertainment, began
IBelieveInHarveyDent.com with a single
image of Aaron Eckhart as Dent (this same
image would soon appear on flyers, small
posters, and t-shirts). Soon after that,
IBelieveInHarveyDentToo.com came out
with a vandalized or “Jokerized” image of
Dent that had a space at the bottom where
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you could submit your email address. With
every email address submitted, a tiny pixel
would be removed. In a short, short amount
of time (I believe less than 24 hours later)
enough people had submitted their email
addresses to the website that all the pixels QuickTime™ and a
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glimpse of Heath Ledger as the Joker.
The image was on the site a brief time, but
long enough for friends to copy the image
and add it to their Facebook profiles. The
Joker faded away, and a message
containing upper and lower-cased “ha”‘s QuickTime™ and a
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were left in its wake, as well as a message
saying “See you in December.” Most people
took that to mean the release of the teaser
trailer, and they were right, although the

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16. Why The Dark Knight's Viral Marketing is Absolutely Brilliant
In a stroke of genius marketing, The Dark Knight took over Comic Con 07.
There were pics of people in Clown costumes (sent via WhySoSerious and
the Gotham newspaper website for The Gotham Times), there were
messages inside balloons, telephone numbers to call, airplanes giving
messages from above, a riddle involving the Joker laughing in Morse code. It
was intense.
The payoff was a picture of the Joker in a car, a pic of him holding a knife to
Rachel Dawes (Maggie Gyllenhaal) throat, and a few other little nuggets for
the fans (including the advance teaser trailer which most of us had already
found TiredYouTube, except nowelite
on offor a change of page? Our job?
Ready
your miserable, dead-end
it was in HD). It started with this…
organization is expanding! We’re looking for
fresh faces to represent us in an important
upcoming negotiation. You must be 18 or
older to apply. Enjoy a career in a lucrative,
ultra high-profile field. Our associates make QuickTime™ and a
their own hours, enjoy great benefits and, in decompressor
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what it takes? Qualified recruits must have:
An open mind, Strong moral compass, the
ability to improvise. Recruits are encouraged
to ask a friend with access to the internet to
AT 1PM, thefrom home. If you don’t have any
help them website
friends, consider hiring one.
www.whysoserious.com changed from its
countdown, and proclamation of building
an army, to something different

18. There has never been a film that was more smartly marketed than The Dark
Knight. Warner Bros. has pumped a lot of money on marketing, reportedly over
$100 million in advertisements such as commercials, billboards, posters, buses,
and Formula One racecars. Factor in toys, games, and other promotional
materials. This stuff costs money and Warner Bros. held nothing back in
promoting The Dark Knight (which had to be that way since it’s the only Batman
movie without Batman in the title).
There was more viral marketing, too,
but this didn’t have the same payoff
or excitement that the early Comic
Con event had. For instance, if you
were in select cities, you could go
and visit the I Believe In Harvey Dent QuickTime™ and a
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(casually timed with the Republican
and Democratic Presidential
Primaries) and get stickers and t-
shirts. Rachel Dawes gave a video
press conference. You could literally
vote for Harvey Dent. If you
submitted your cell phone number
you could get a phone call from Dent
himself proclaiming that we can take
back Gotham.

19. There was also the Clown Travel Agency bit. A list of cities and terrible puns
led fans to bowling alleys where very few lucky first-comers got a bowling ball
bag complete with a custom ball and a cell phone that dialed out to a creepy
recording.
People involved in the campaign were eventually rewarded for their loyalty by
being given free passes to IMAX pre-screenings of The Dark Knight, courtesy
of the WhySoSerious’ “Human Resources” dept. A great finale to a fun ride
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