Hi. Unfortunately, you didn't introduce the areas of graphic design that the question presents. However, to try and help you, I'm going to describe the responsibilities and skills that graphic designers need to have in the most popular areas that encompass most of these professionals.
Doing an internet search, I could see that graphic designers usually work in the field of digital design, web design and interior design.
In digital design, the designer must be able to develop visual communication pieces. For this, he must have skills that allow him to use essential software for the creation of graphic materials that determine not only the visual identity of a company, but all its advertising. This professional is responsible for creating billboards, business cards, brochures, menus, among others.
The interior designer is responsible for creating internal environments. These environments must be functional and adapted to the activities that will be carried out in it, but they need to be harmonious and have an attractive and pleasant look. In this case, the interior designer must have knowledge of architecture, landscaping, decoration, lighting and comfort. Also, the ability to manipulate software is highly needed.
The Web designer is responsible for the standardization and functioning of pages and websites. In other words, this professional needs to create all kinds of internet pieces, such as blogs, company pages, advertisements, virtual stores, among other types of pages, that allow not only the visual identity of a company to be maintained, but that it also allows the user to access these pages fluidly and securely. This type of designer needs to have software programming skills, as programming is the core of their activities.