Modern marketing began in the 1950s when people started to use more than just print media to endorse a product. As TV -- and soon, the internet -- entered households, marketers could conduct entire campaigns across multiple platforms. And as you might expect, over the last 70 years, marketers have become increasingly important to fine-tuning how a business sells a product to consumers to optimize success.
Data-driven advertising: Users generate a lot of data in every step they take on the path of customer journey and brands can now use that data to activate their known audience with data-driven programmatic media buying. Without exposing customers' privacy, users' data can be collected from digital channels (e.g.: when customer visits a website, reads an e-mail, or launches and interact with brand's mobile app), brands can also collect data from real world customer interactions, such as brick and mortar stores visits and from CRM and sales engines datasets. Also known as people-based marketing or addressable media, data-driven advertising is empowering brands to find their loyal customers in their audience and deliver in real time a much more personal communication, highly relevant to each customers' moment and actions.
Social media is used to facilitate two-way communication between companies and their customers. Social media outlets such as Facebook, Twitter, Tumblr, Pinterest, Snapchat and YouTube allow brands to start a conversation with regular and prospective customers. Viral marketing can be greatly facilitated by social media and if successful, allows key marketing messages and content in reaching a large number of target audiences within a short time frame. Additionally, social media platforms can also house advertising and public relations content..
Positioning concerns how to position a product in the minds of consumers and inform what attributes differentiate it from the competitor's products. A firm often performs this by producing a perceptual map, which denotes similar products produced in the same industry according to how consumers perceive their price and quality. From a product's placing on the map, a firm would tailor its marketing communications to meld with the product's perception among consumers and its position among competitors' offering. 
Place refers to the distribution of the product. Key considerations include whether the company will sell the product through a physical storefront, online, or through both distribution channels. When it's sold in a storefront, what kind of physical product placement does it get? When it's sold online, what kind of digital product placement does it get?
If you're focusing on inbound techniques like SEO, social media, and content creation for a preexisting website, the good news is you don't need very much budget at all. With inbound marketing, the main focus is on creating high quality content that your audience will want to consume, which unless you're planning to outsource the work, the only investment you'll need is your time.
Search engine marketing - Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate Search engine optimization, which adjusts or rewrites website content and site architecture to achieve a higher ranking in search engine results pages to enhance pay per click (PPC) listings.
For that reason, you're probably less likely to focus on ‘leads' in their traditional sense, and more likely to focus on building an accelerated buyer's journey, from the moment someone lands on your website, to the moment that they make a purchase. This will often mean your product features in your content higher up in the marketing funnel than it might for a B2B business, and you might need to use stronger calls-to-action (CTAs).
Because digital marketing has so many options and strategies associated with it, you can get creative and experiment with a variety of marketing tactics on a budget. With digital marketing, you can also use tools like analytics dashboards to monitor the success and ROI of your campaigns more than you could with a traditional promotional content -- such as a billboard or print ad. How to Start a Digital Marketing Agency in 2020 [SMMA]
Digital Marketing Channels are systems based on the Internet that can create, accelerate, and transmit product value from producer to a consumer terminal, through digital networks. Digital marketing is facilitated by multiple Digital Marketing channels, As an advertiser one's core objective is to find channels which result in maximum two-way communication and a better overall ROI for the brand. There are multiple digital marketing channels available namely;
Strategic analysis is designed to address the first strategic question, "Where are we now?"  Traditional market research is less useful for strategic marketing because the analyst is not seeking insights about customer attitudes and preferences. Instead strategic analysts are seeking insights about the firm's operating environment with a view to identifying possible future scenarios, opportunities and threats. What is digital marketing | digital marketing basics| digital marketing introduction| Tutorial
^ , Blackwell Reference, Kotler, P., "What consumerism means for marketers", Harvard Business Review, vol. 50, no. 3, 1972, pp. 48–57; Wilkie, W.L. and Moore, E.S., "Macromarketing as a Pillar of Marketing Thought," Journal of Macromarketing, Vol. 26 No. 2, December 2006, pp. 224–32 doi:10.1177/0276146706291067; Wilkie, W.L. and Moore, E.S., "Scholarly Research in Marketing: Exploring the "4 Eras" of Thought Development," Journal of Public Policy and Marketing, Vol. 22, No. 2, 2003, pp. 116–46
At first, I wondered why marketing was a necessary component during product development, or a sales pitch, or retail distribution. But it makes sense when you think about it -- marketers have the firmest finger on the pulse of your consumer persona. They research and analyze your consumers all the time, conducting focus groups, sending out surveys, studying online shopping habits, and asking one underlying question: "Where, when, and how does our consumer want to communicate with our business?"
Video advertising - This type of advertising in terms of digital/online means are advertisements that play on online videos e.g. YouTube videos. This type of marketing has seen an increase in popularity over time. Online Video Advertising usually consists of three types: Pre-Roll advertisements which play before the video is watched, Mid-Roll advertisements which play during the video, or Post-Roll advertisements which play after the video is watched. Post-roll advertisements were shown to have better brand recognition in relation to the other types, where-as "ad-context congruity/incongruity plays an important role in reinforcing ad memorability". Due to selective attention from viewers, there is the likelihood that the message may not be received. The main advantage of video advertising is that it disrupts the viewing experience of the video and therefore there is a difficulty in attempting to avoid them. How a consumer interacts with online video advertising can come down to three stages: Pre attention, attention, and behavioural decision. These online advertisements give the brand/business options and choices. These consist of length, position, adjacent video content which all directly affect the effectiveness of the produced advertisement time, therefore manipulating these variables will yield different results. Length of the advertisement has shown to affect memorability where-as longer duration resulted in increased brand recognition. This type of advertising, due to its nature of interruption of the viewer, it is likely that the consumer may feel as if their experience is being interrupted or invaded, creating negative perception of the brand. These advertisements are also available to be shared by the viewers, adding to the attractiveness of this platform. Sharing these videos can be equated to the online version of word by mouth marketing, extending number of people reached. Sharing videos creates six different outcomes: these being "pleasure, affection, inclusion, escape, relaxation, and control". As well, videos that have entertainment value are more likely to be shared, yet pleasure is the strongest motivator to pass videos on. Creating a ‘viral’ trend from mass amount of a brands advertisement can maximize the outcome of an online video advert whether it be positive or a negative outcome. Digital Marketing Course Part - 1 | Digital Marketing Tutorial For Beginners | Simplilearn