What has led to the fact that the topic of services has become the most meaningful factor resulting in the GDP growth in majority of countries these days?

Services is a an area, which according to the thoughts as well as researches made by various professionals in the area of economy is something necessary for the existence of each country. It is proved by the fact that owing to the series of different changes and improvements its role concerning contributing to the total GDP growth in a lot of countries has substantially grown.