According to Khan Academy, exist different factors that affect the demand of goods and services, this factors are: the willingness to purchase based on tastes and preferences; the income of the consumer; the prices of related goods or services; and finally, the size or the composition of the population.

Here is an example of the changes in the demand of buying car:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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This is one of the most important factor that affect our company because with this we could know who and what are going to buy our product and therefore the expenses and the earning that would confront the company.

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Reference: 

ttps://www.khanacademy.org/economics-finance-domain/microeconomics/supply-demand-equilibrium/demand-curve-tutorial/a/what-factors-change-demand

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