Graphic design is the art and practice of visual communication, using typography, imagery, color, and layout techniques to convey a message or evoke a specific reaction from the audience. It encompasses a wide range of mediums, including print, digital, and multimedia, and is used in various fields such as advertising, branding, web design, and publishing.

Graphic design is highly necessary in today's visually driven world for several reasons. Firstly, it helps businesses and organizations effectively communicate their message and values to their target audience, enhancing brand recognition and awareness. A well-designed logo, for example, can instantly convey a company's identity and leave a memorable impression on customers. Additionally, graphic design plays a crucial role in marketing and advertising campaigns, where compelling visuals can capture attention, communicate key selling points, and drive engagement and conversion.

Moreover, in the digital age, where online presence is paramount, good graphic design is essential for creating visually appealing websites, social media posts, and digital ads that attract and retain users' attention. It also improves user experience by making information easier to digest and navigate.

In summary, graphic design is not only necessary but also invaluable for businesses and organizations looking to stand out in a crowded marketplace, communicate effectively with their audience, and achieve their goals.