What are the examples of most popular services we tend to make use of really systematically?

Services is a term that has diverse meanings. For example people who have greater experience in the field of economics are rather likely to correlate it with one of the most influential areas that contribute the most to the development of each economy. On the other hand, a lot of people, who are not interested in the above analyzed field, tend to think about the above presented term rather like something that we benefit from systematically, like going to a hairdresser, having our automobile repaired by a mechanic etc.