This refers to how the product gets to the customer; the distribution channels and intermediaries such as wholesalers and retailers who enable customers to access products or services in a convenient manner. This third P has also sometimes been called Place or Placement, referring to the channel by which a product or service is sold (e.g. online vs. retail), which geographic region or industry, to which segment (young adults, families, business people), etc. also referring to how the environment in which the product is sold in can affect sales.  4 Principles of Marketing Strategy | Brian Tracy
Whether it's a print ad design, mass customization, or a social media campaign, a marketing asset can be judged based on how effectively it communicates a company's core value proposition. Market research can be helpful in charting the efficacy of a given campaign and can help identify untapped audiences, in order to achieve bottom-line goals and increase sales.
There are many kinds of advertising that you can use to promote your business, teach customers about your products, and generate sales. Print, radio, and television campaigns are types of advertising, as are direct mail, email, and internet marketing. If you have a website, it should be optimized for search to help customers find it through search engines like Google, Yahoo!, and Bing. Newsletters, press releases, and articles are also forms of marketing used to capture leads and generate sales. Some companies also use referral marketing, where satisfied customers refer others (often for a reward) to increase business.
Taking these statistics into consideration, online marketing is a critical element of a complete marketing strategy. It is vital for marketers to use online tools such as social media and digital advertising, both on website and mobile device applications, and internet forums. Considering an appropriate distribution channel for products purchased online is also an important step.
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. 
Email marketing - Email marketing in comparison to other forms of digital marketing is considered cheap; it is also a way to rapidly communicate a message such as their value proposition to existing or potential customers. Yet this channel of communication may be perceived by recipients to be bothersome and irritating especially to new or potential customers, therefore the success of email marketing is reliant on the language and visual appeal applied. In terms of visual appeal, there are indications that using graphics/visuals that are relevant to the message which is attempting to be sent, yet less visual graphics to be applied with initial emails are more effective in-turn creating a relatively personal feel to the email. In terms of language, the style is the main factor in determining how captivating the email is. Using casual tone invokes a warmer and gentle and inviting feel to the email in comparison to a formal style. For combinations; it's suggested that to maximize effectiveness; using no graphics/visual alongside casual language. In contrast using no visual appeal and a formal language style is seen as the least effective method. A DAY IN THE LIFE OF A DIGITAL MARKETING MANAGER | WHAT DOES A DIGITAL MARKETER DO? & SALARIES