Start-ups are very vulnerable in the business world.
Marketing a job that involves encouraging people to buy a product or service:

a career in marketing.
retail trade the activity of selling goods to the public, usually in shops:

The job is open to applicants with over two years' experience in retail.
gap in the market  an empty space or opening in the middle of something or between two things:

start-up costs
Marketing: a job that involves encouraging people to buy a product or service: 

retail trade: the activity of selling goods to the public, usually in shops

start-up costs
Marketing: a job that involves encouraging people to buy a product or service: 

retail trade: the activity of selling goods to the public, usually in shops

 gap in the market: an opportunity for a product or service that does not already exist: 

 

Marketing refers to the promotion of a product or service. It can take numerous forms, including advertising, emailing customers, sending out leaflets or brochures, engaging with potential customers via social media, and so on.
start-up:
The term “start-up” is used to describe a brand new business, typically in its first few months or years of trading. The term has connotations of entrepreneurship, and the implication is often that the company will grow significantly in size. It’s often associated with the tech industry, because the term was used extensively during the dot com boom, but it can apply to any new business.
retail trade:
Retail trade is widely known as a very competitive area of commercial endeavor, and observers note that many fledgling retail establishments do not survive for more than a few years. Indeed, competition for sales has become so great that consumers have seen a marked blurring of product lines among retailers.
gap in the market:
A gap in the market is a place or area that current businesses aren’t serving. For example, Netflix has filled several market gaps over the years. First, with its initial mail-order movie rentals and then with its streaming platform. Whole Foods fills the market gap that occurred when health-conscious consumers wanted a central

start-up costs
Marketing: a job that involves encouraging people to buy a product or service: 

retail trade: the activity of selling goods to the public, usually in shops

 gap in the market: an opportunity for a product or service that does not already exist: 

Start-Up
is a South Korean television series starring Bae Suzy, Nam Joo-hyuk, Kim Seon-ho and Kang
retail trade-
Retail trade is widely known as a very competitive area of commercial endeavor, and observers note that many fledgling retail establishments do not survive for more than a few years. Indeed, competition for sales has become so great that consumers have seen a marked blurring of product lines


A gap in the market
is an opportunity to make and sell something that is not available yet. However, consumers would like to have it. The ‘gap’ refers to the difference between the supply and demand for that product. In other words, it means a consumer-need that supply has not yet met.