Viral marketing is a free form of promotion based on a word of mouth process. When you like something, it feels second nature to share your discovery with someone you like. Like friends, relatives or colleagues.

Various forms of easy to use viral marketing methods are available online to improve your online sales and increase search engine visibility. The following forms of viral marketing techniques play a vital role in the success of your online
marketing. Most significant free techniques include:
• Email marketing
• Blogs
• Article submission
• Social networking
• Newsletters
• Pod casts
• E-books and whitepapers
• Online forums
Viral Marketing Tools:
The market psychology: A ‘free’ service is an instant attention grabber. Nothing sells a product better than giving it free of cost initially. It may sound ironical but the strategy is very effective, especially in the case of web services. Promoting a product by offering trials directly or through the existing customer base lures a client to try it.
Responsibility: Willingness to accept a remark whether good or bad is the hallmark of a responsible campaigner. People trust a service better if it is open to criticism and suggestions. If a person feels more involved in the process, there is a high probability of that person using the product or service. People who have Internet access are especially prompt in commenting on a service.
Resolving: Viral marketing is a very sensitive medium. The information passed on at such speed also involves a lot of risk. The marketing medium cannot be controlled once the process begins. Therefore it is extremely important to project the desired and carefully studied image of the product.

Viral marketing is done through funny interactive Flash games, video clips, images, and textual content. Whatever is the size or type of online business you have, you can benefit from viral marketing through article writing and distribution since textual content plays a vital role in every form of communication, be it online or offline.
Social networking sites are ideal for viral marketing. Submit your short, informative article that reveals an idea or concept in an entertaining or interesting way in blogs, discussion forums, press releases and newsletters. To run an effective viral campaign – offer an incentive, personalize the referral email and track and analyze the results.
Viral marketing has many advantages such as:
Low cost marketing
Zero advertising cost
Your visitors can spread the word 24/7
Set one time and “forget system”
This kind of marketing is easier than you think. Some require a little script you can add to your website and require a link you can promote. One person signing up to your link can lead to thousands as it goes on and on without you doing any promotion.
Viral marketing’s main purpose is to make known your message to as many individuals as possible without spending any money for promotion or advertising.
A successful viral marketing campaign will grow exponentially, last for long time, and before you know it, you’ll generate tons of traffic, newsletter subscribers and customers. Here are some other benefits you can gain from Viral Marketing: It can automate your marketing efforts, increase or improve your targeted traffic, build brand recognition, and many more.

Statistic shows that when people like something, they will usually spread the word to three other people on their own. If your campaign is successful you’ll be able to get your message in front of exponentially more people than you could ever do by yourself.          Save time and money.