Game Life: “After a big CS:GO update this past March, CS:GO pro players started using Shotguns more often. Now, buying Shotguns can really pay off in certain situations and thats why it became part of Meta. In this article, you can read how to use Shotguns in CS:GO.”
Source: N4G PC How To Use Shotguns In CS:GO: Weapon Guide And Positions To Play