Final consumption expenditure is basically when someone uses money to buy things for themselves or their household to use or consume.
Let's say you have some money saved up and you want to buy a toy for yourself. When you go to the store and buy that toy, you are using your money for final consumption expenditure.
But it's not just toys - anything that you buy for yourself or your household to use or consume counts as final consumption expenditure. This could be things like groceries, clothes, furniture, or even services like going to the movies or getting a haircut.
People and households are not the only ones who engage in final consumption expenditure - businesses and governments also do it too. For example, a company might buy new equipment for their employees to use or a government might spend money on building roads for people to drive on.
Final consumption expenditure is an important part of the economy because it represents the total amount of spending on goods and services that will not be used for further production. In other words, it's the end goal of all economic activity - making things that people can use and enjoy.