The development of digital marketing is inseparable from technology development. One of the key points in the start of was in 1971, where Ray Tomlinson sent the very first email and his technology set the platform to allow people to send and receive files through different machines. However, the more recognisable period as being the start of Digital Marketing is 1990 as this was where the Archie search engine was created as an index for FTP sites. In the 1980s, the storage capacity of computer was already big enough to store huge volumes of customer information. Companies started choosing online techniques, such as database marketing, rather than limited list broker. This kind of databases allowed companies to track customers' information more effectively, thus transforming the relationship between buyer and seller. However, the manual process was not so efficient.
Understanding the working mechanism of social algorithms is not a piece of cake. The algorithm for each social platform works differently. For instance, on Facebook, a core factor that affects the rankings of a post is its relevancy score, whereas on YouTube the total watch time of the video per session decides whether a video enters a ‘Recommended Video’ section or not.
Increasingly, social marketing is described as having "two parents." The "social parent" uses social science and social policy approaches. The "marketing parent" uses commercial and public sector marketing approaches. Recent years have also witnessed a broader focus. Social marketing now goes beyond influencing individual behaviour. It promotes socio-cultural and structural change relevant to social issues. Consequently, social marketing scholars are beginning to advocate for a broader definition of social marketing: "social marketing is the application of marketing principles to enable individual and collective ideas and actions in the pursuit of effective, efficient, equitable, fair and sustained social transformation". The new emphasis gives equal weight to the effects (efficiency and effectiveness) and the process (equity, fairness and sustainability) of social marketing programs. Together with a new social marketing definition that focuses on social transformation, there is also an argument that "a systems approach is needed if social marketing is to address the increasingly complex and dynamic social issues facing contemporary societies"
Prioritizing clicks refers to display click ads, although advantageous by being ‘simple, fast and inexpensive’ rates for display ads in 2016 is only 0.10 percent in the United States. This means one in a thousand click ads are relevant therefore having little effect. This displays that marketing companies should not just use click ads to evaluate the effectiveness of display advertisements (Whiteside, 2016).