On March 6, 2012, Dollar Shave Club launched their online video campaign. In the first 48 hours of their video debuting on YouTube they had over 12,000 people signing up for the service. The video cost just $4500 to make and as of November 2015 has had more than 21 million views. The video was considered as one of the best viral marketing campaigns of 2012 and won "Best Out-of-Nowhere Video Campaign" at the 2012 AdAge Viral Video Awards.
Choose a niche. As defined by the Business Dictionary, a niche is a “small but profitable segment of a market, suitable for focused attention by a marketer”. In other words, a market niche is large enough to be monetizable (enough members to make it worth wile targeting) – and small enough to be described by just a couple of common parameters, such as age, interests, tech usage, habits, etc.
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The campaign became viral because it could connect to the audience emotionally. People could relate to the concept of the video. The idea was original, and the content was enticing without pushing the products. The ad encouraged social conversation and sensitivity around the beauty of a woman. It empowered women, evoking feelings of warmth, joy, and confidence. Empowerment is a powerful tool, which can enhance the brand image of your company. So build an uplifting relationship with your audience.
Promotional videos can foster trust as well. Some consumers are still skeptical about buying products and services on the internet because they fear fraud and cheating. But effective marketing videos present your products in a conversational form. That creates a sense of individual approach which is why 57% of consumers say that videos gave them more confidence to purchase online.
'The influencers in order to communicate marketing messages to the audiences you seek to reach'. In business, it is indicated that people prefer interaction with humans to a logo. Therefore, it seems that influencers are on behalf of a company to build up a relationship between the brand and their customers. Companies would be left behind if they neglected the trend of influencers in viral marketing, as over 60% of global brands have used influencers in marketing in 2016. The influencer types come along with the level of customers' involvement in companies' marketing. First, unintentional influences, because of brand satisfaction and low involvement, their action is just to deliver a company's message to a potential user. Secondly, users will become salesmen or promoters for a particular company with incentives. For example, ICQ offered their users benefits to create the awareness of their friends. Finally, the mass reached influencers are those who have a huge range of followers on the social network. Recent trend in businesses activity is to offer incentives to individual users for re-posting the advertisement messages to their own profiles. A common type of an incentive puts all the re-posting users into a random draw for a valuable gift 
In cases 3 and 4, even though Bob doesn’t buy the product, he’s now aware of it. The brand and/or product has entered his consciousness. It might be something he returns to in the future. If he likes the idea of it enough, he might talk about it to other friends in the future (“Oh, you like comedy? I’ve been meaning to watch Monty Python, and it looks great.”
The campaign became successful and viral with over 17 million people participating in the challenge worldwide. Many celebrities including Bill Gates, George W. Bush, Oprah Winfrey, Tom Cruise, Mark Zuckerberg, Rihanna, Tim Cook, Rafael Nadal, and Cristiano Ronaldo took part in the challenge. Below video shows the Ice Bucket Challenge taken by Bill Gates:
By increasing the exposure of your brand and delivering value to your audience, you have a stronger likelihood of getting the success you need in your viral marketing campaign. Awareness is required even if the content is great so that people can share and make it popular. You need to create something that pulls in the kind of attention that will spread.
In brief, the affiliate marketers promote products or services that don’t belong to them. They do that by endorsement, detailed reviews, or more direct marketing approach. The promotion can happen on the affiliate’s personal website or blog, on a YouTube channel, Twitch stream, over Facebook or Instagram, etc. Anywhere a link can be published or an individual promo code displayed is good.
The most famous expressions of viral marketing are videos and ads. Its strength comes from the fact that people like to share information they find fun and interesting with others and send it to each other via social media. For instance, think of ads in the form of funny videos, images, texts or an interactive Flash game. It can be risky though. People generally don’t like to forward messages that are clearly commercial. It can also happen that the wrong audience is approached and the message doesn’t reach the right people. That could be bad for public relations.
Blog – usually a part of the website, but can be a separate subdomain or even domain. Providing relevant and useful information and opinions about your niche topic in a blog has many advantages: blogs help your website rank higher on search engines if regularly updated and optimized. They build your reputation as an authority in your niche. A blog also provides a platform for sharing a variety of content such as articles, photos, podcasts, videos, e-books etc.
Trust is a second critical factor for referral marketing. Studies show that customers almost always trust “real people’s” opinions over generic ads and branded sales pitches. If you know and like a person, you’re likely to trust their opinions—especially when compared to a salesperson working on commission. Take TripAdvisor as an example. Even if you don’t know the person reviewing a hotel or restaurant, you’re more likely to trust their review than you would the business’s website or a billboard promoting the company.
The first known large-scale non-commercial spam message was sent on 18 January 1994 by an Andrews University system administrator, by cross-posting a religious message to all USENET newsgroups. In January 1994 Mark Eberra started the first email marketing company for opt in email list under the domain Insideconnect.com. He also started the Direct Email Marketing Association to help stop unwanted email and prevent spam.  
For instance, the Pew Internet & American Life Project has demographic data that suggests individuals between the ages of 18 and 33 are the most likely to use mobile Internet technology like smartphones and tablets, while the “Gen-X” demographic of individuals who are in their 30’s and 40’s are far more likely to seek out information through their laptop and desktop computers.(See also Targeted Marketing)
As referral marketing continues to be a key driver for acquiring new customers, brands are looking for more ways to incentivize existing customers to invite their friends. While traditional online referral marketing programs continue to be fruitful, brands are starting to think outside the box to develop new ways to prompt their customers to refer friends.
The keyword tool is able to tell us that nearly 700,000 people search for window tinting each month globally, and on a smaller scale 74,000 in the UK. With an average amount of monthly searches in mind we now need to know just how much exposure the top spots of search results could potentially get. In fact, it is rumored that the website ranked first for any given keyword will receive around forty percent of all of the search engine traffic of that specific keyword, with the rest of the first page results having an almost equal share of the remainder. The 2nd, 3rd, 4th and so on pages tend to get very little traffic, if any at all.