Market share is the proportion of a particular market that is held by business, product, brand or a number of businesses or products, often shown in a pie chart.
Online retailing is good for retailers as it can be open 24/7, does not require a physical store, has lower costs as there is no need to pay rent, can expand the market, and has a larger audience.
Businesses compete by innovating products to be consumers' first choice, changing prices to keep consumers, and matching their competition to avoid losing customers and profit.
Online retailing is beneficial for customers as it gives them access to products from a wide range of businesses internationally, is less time consuming, allows them to shop from home, delivered to the door, is more convenient, and is good for situations like covid.
Changes in legislation can involve health and safety rules, tariffs, tax, new laws, plastic charges, increased business costs, safety of products, and selling standards.
Psychographic segmentation involves grouping customers according to their attitudes, opinions and lifestyles, for example, sports products aimed at 'extreme' sports players.
People's attitudes may be used to segment the market, for example, some pension funds are geared towards those who want to invest in 'ethical' businesses.
A drawback of psychographic segmentation is that it's difficult to collect data on beliefs, lifestyles or attitudes of customers, and businesses need the help of specialist businesses.
Behavioural segmentation segments markets due to how consumers relate to a product, and there are different methods of behavioural segmentation: usage rate, loyalty, time and date of consumption.