sales job and other jobs
A sales job is a career in which someone is responsible for presenting and selling products and services
 Sales is the toughest job compared to other jobs but not because of the pressure, not because of the targets not because of anything else...sales appear to be the to be the toughest job for people who are not fit for it
In an organization there are various departments having several jobs such as HR Jobs, Operational Jobs, Financial Jobs and the most important one is the sales Jobs. Sales jobs in comparison to other jobs is one of the most toughest job...In every job there is a pressure but in sales the pressure is of different kind as it is calculated in terms of revenue generated.

In sales job it is a true the fact that you have to be on target every time(Yearly , Quarterly or Monthly).Suppose if you have achieved the target you will be praised by everyone but if in the very next month you are unable to achieve your target then the scenario will be totally wise versa but in other jobs it is not like so
The importance of the selling job to the organization.

Sales jobs bring autonomy to the job, You can set your own path to reach your goals, provides freedom because the only thing that matters in revenue not how you brought that.

Sales jobs provide better earning potential, more you produce results more you get paid. Sales professional are the back bone of an organization, the revenue generators.

Sales is the only function in the company which generates revenue, therefore any performer in sales gets easy hike/growth comparison to other functions
Sales jobs enhances business growth.
Sales play a key role in the building of loyalty and trust between customer and business. Trust and loyalty are the main reasons why a customer would choose to recommend your company to a friend or family member or write a great review of your product or service online

Step-by-step explanation

predominance of the internet in society
The rise of the internet and the technology has led to dramatic alteration of the art of selling. Although the internet and smartphones have had an impact on all kinds of industries, it had a particularly profound impact on the sales world. The internet has completely changed how prospects make buying decisions, as well as how salespeople sell. Today's buyers have all the power.
Salespeople also have new advantages and challenges. There is now a huge number of technologies, techniques, and resources that help salespeople connect and learn. The following are the ways in which the internet has affected sale in the society:
The evolution of the internet and the research buyer's conduct prior to engagement however, do mean that businesses need to have a significant online presence. Look at it this way if you can't be found online (including social) then you will likely be in a position where you are never invited to engage. In addition having a positive presence online is key. How many of us have looked at a hotel on TripAdvisor that has had bad reviews and changed our mind about booking. The process is exactly the same for buyers, if you have any bad press online, it is likely that that you will not be considered viable by the buyer.
Internet has reduced the sales cycle as the majority of the research phase is conducted by the buyer prior to engagement with the sales person.
Researching used to be a time-consuming task for both salespeople and buyers. Salespeople had to have multiple meetings before getting all the information they needed for an in-depth quote. Salespeople are now able to research their prospects and can find potential pain points well before the first meeting. Buyers once had to go directly through a salesperson to get information on a product. Now, buyers can do most of their research alone and only contact a sales rep when they are already halfway through the sales cycle.
Salespeople today need to be agile and available. They need to be able to communicate with prospects on multiple platforms and be responsive via email, phone, and social media.
New technology makes it easy to find organizations on social media that fit your target market. These prospects are more likely to be interested in your product or service, increasing the chance of conversion. Although all this information was available decades ago, it now takes less time and effort to know everything about your leads.

 Internet technology impact on the steps of personal selling

Personal selling is the selling the product and dealing with customers face-to-face. A salesperson can use different techniques to convince the customer. Personal selling requires perfect knowledge or awareness regarding the product so the seller can satisfy the consumer's objections.
Internet technology has enhanced business accessibilities. Advancement in the technology world has created a lot more opportunities for sales people who are doing online selling.
However personal selling has been impacted in different ways.. The biggest impact, however, probably has been on prospecting,  reapproach,  product demonstration, and follow-up.
Prospecting: 
sales organizations use the Internet extensively to collect the names, addresses, telephone/fax numbers, and e-mail addresses of prospects.
Reapproach:
The Internet provides access to vast amounts of secondary data; and thus can be used to research customers and their respective industries. This information helps salespeople plan for the sale. 
The Approach: This step typically refers to the first minute or so of the face-to-face meeting between salesperson and customer which has been negatively affected.
Product Demonstrations: 
Internet technology is being used increasingly by salespeople to make effective product demonstrations remotely. For example, through services such as GoToMyPC.com, a salesperson can talk to a client on the phone, as they both simultaneously view a detailed product demonstration on their PCs.
Follow-up: Through email, for example, the Internet provides a tremendous interactive medium to keep in touch with the customer after the sale and in an on-going basis.

Salespeople born or made
Sales, like any skill, takes practice and born salespeople don't exist. What does exist is people blessed with certain talents and traits that make selling come more naturally to them. But the best salespeople are those who have acquired and attained mastery of learned skills and abilities - emotional intelligence, communication, analysis, and sales and business acumen.

Majority of top salespeople are gifted with innate talents. However, many others are self-made successes who have learned how to apply their language specialization and build their intuition. They know what accounts they should spend their time on and always navigate to powerful decision-makers in order to create the opportunity to persuade them to buy.
Skills are not born, inherent abilities. They're things that are taught, practiced, and mastered through repetition, retention, experience, and work. That means anyone can learn how to be successful in a sales career. One simply needs the right training, reinforcement, and coaching. The Skills Salespeople need include Communication skills, Analytical skills, Sales skills, Emotional intelligence

 salesforce structures depending on the type of business
A sales force structure is defined by two main decisions: the specialization decision and the reporting relationship decision. Sales force structure decisions impact customer and company results by directly influencing salespeople and their activities. Sales force structures need to change as business needs evolve.

Geography-Based Sales
A geographically focused sales team is very common and effective in certain industries. The concept is that if your salespeople specialize in a certain area, they can scour it thoroughly and understand its workings. The sales approach to a suburban community can be very different from an inner-city area or a rural town.
Geographically-based sales allows salespeople to know their markets and develop appropriate approaches to an area. It also can prevent salespeople from bumping into each other if their maps and territories are well defined. Industries that use this approach include direct cosmetic sales, telecommunications, print advertising and staffing.
Product-Based Sales
Having salespeople become experts in a specific product or product line can make them stronger sellers. This is especially true with products that are highly technical or which are sold to professionals.
Medical device and equipment sales, for example, requires a salesperson to have an in-depth understanding of his product. Physicians who might purchase these products can have complicated and technical questions that require the salesperson to have a thorough understanding of how the product works and the setting in which it is used.
Cooperation
Whether your sales team is a small group or multiple teams of people, you'll need to think out how to foster cooperation. Your company doesn't benefit from two different sales teams approaching the same client about two different products. Likewise, having the same client with multiple offices and locations approached by two or more salespeople at different sites only creates confusion for everyone.