"Form follows function" is a design principle that states that the form of an object or design should be determined by its function. This means that the design should primarily be aimed at fulfilling the requirements and purposes for which it was created.

In graphic design and web design, this means that the appearance and design of logos, flyers, websites, apps, etc. should be geared towards fulfilling their functions. For example, a logo should be designed to be easily recognisable, concise and convey the message of the company or brand. A website should be easy to navigate and user-friendly to make it easy for visitors to find the information they need.

When applying the principle of "form follows function" in graphic design and web design, it is important that the design is not only aesthetically pleasing, but also functional. A good design should therefore not only look good, but also fulfil the intended function.