Any of various extremely small, often disease-causing agents consisting of a particle (the virion), containing a segment of RNA or DNA within a protein coat known as a capsid. Viruses are not technically considered living organisms because they are devoid of biological processes (such as metabolism and respiration) and cannot reproduce on their own but require a living cell (of a plant, animal, or bacterium) to make more viruses. Viruses reproduce first either by injecting their genetic material into the host cell or by fully entering the cell and shedding their protein coat. The genetic material may then be incorporated into the cell's own genome or remain in the cytoplasm. Eventually the viral genes instruct the cell to produce new viruses, which often cause the cell to die upon their exit. Rather than being primordial forms of life, viruses probably evolved from rogue pieces of cellular nucleic acids. The common cold, influenza, chickenpox, smallpox, measles, mumps, yellow fever, hemorrhagic fevers, and some cancers are among the diseases caused by viruses.
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.
In this case, Uber is offering a set monetary reward for every rider or driver referred, as well as the opportunity to earn awards for referring more people. Uber can’t get away with simply thanking its participants. It needs a structured program for tracking when referrals occur, whether or not they’re successful (according to the program’s terms and conditions), and issuing the promised rewards.
The participants were asked to challenge minimum three persons to take the Ice Bucket Challenge. This was one of the reasons why campaign became viral. If one person tells three other people about the challenge, and those three tell the other three, a viral loop is created. By setting a call to action, and asking your audience to share about your campaign with others, you too can keep your campaign alive.
Alright, you’re ready to publish your video. You shot the footage, edited it together, added music and a voice over, and exported it for the web. The next step is to get your video online so your audience can start viewing and sharing it. You have several options for hosting videos online, and in this section, we’ll talk about some of the best ones.
'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 
A strategy that is linked into the effectiveness of digital marketing is content marketing. Content marketing can be briefly described as "delivering the content that your audience is seeking in the places that they are searching for it". It is found that content marketing is highly present in digital marketing and becomes highly successful when content marketing is involved. This is due to content marketing making your brand more relevant to the target consumers, as well as more visible to the target consumer.
Online advertisers can collect data on their ads' effectiveness, such as the size of the potential audience or actual audience response,:119 how a visitor reached their advertisement, whether the advertisement resulted in a sale, and whether an ad actually loaded within a visitor's view.:59 This helps online advertisers improve their ad campaigns over time.
Viral marketing is any marketing technique that induces websites 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. A popular example of successful viral marketing is Hotmail, a company now owned by Microsoft, that promoted its services and its own advertisers' messages in every user's email notes.