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. 
For example, to implement PPC using Google AdWords, you'll bid against other companies in your industry to appear at the top of Google's search results for keywords associated with your business. Depending on the competitiveness of the keyword, this can be reasonably affordable, or extremely expensive, which is why it's a good idea to focus building your organic reach, too.
Marketing’s principal function is to promote and facilitate exchange. Through marketing, individuals and groups obtain what they need and want by exchanging products and services with other parties. Such a process can occur only when there are at least two parties, each of whom has something to offer. In addition, exchange cannot occur unless the parties are able to communicate about and to deliver what they offer. Marketing is not a coercive process: all parties must be free to accept or reject what others are offering. So defined, marketing is distinguished from other modes of obtaining desired goods, such as through self-production, begging, theft, or force.
Connecting the dots between marketing and sales is hugely important -- according to Aberdeen Group, companies with strong sales and marketing alignment achieve a 20% annual growth rate, compared to a 4% decline in revenue for companies with poor alignment. If you can improve your customer's' journey through the buying cycle by using digital technologies, then it's likely to reflect positively on your business's bottom line.
In 1980, Michael Porter developed an approach to strategy formulation that proved to be extremely popular with both scholars and practitioners. The approach became known as the positioning school because of its emphasis on locating a defensible competitive position within an industry or sector. In this approach, strategy formulation consists of three key strands of thinking: analysis of the five forces to determine the sources of competitive advantage; the selection of one of three possible positions which leverage the advantage and the value chain to implement the strategy. In this approach, the strategic choices involve decisions about whether to compete for a share of the total market or for a specific target group (competitive scope) and whether to compete on costs or product differences (competitive advantage). This type of thinking leads to three generic strategies:
Diversification is the riskiest area for a business. This is where a new product is sold to a new market. There are two type of Diversification; horizontal and vertical. 'Horizontal diversification focuses more on product(s) where the business is knowledgeable, whereas vertical diversification focuses more on the introduction of new product into new markets, where the business could have less knowledge of the new market. FREE Digital Marketing Course