The acronym (pronounced "wiz-ee-wig") stands for "What You See Is What You Get." It describes a type of editing software that allows you to create and format content—such as text, images, and page layouts—exactly as it will appear in its final published or printed form.

The concept of WYSIWYG traces back to the late 1960s and 70s: WYSIWYG Editor - UTMB Web Resources

Rather than writing lines of code (like HTML or CSS), users interact with a graphical interface similar to a word processor. The Evolution: From "Mother of All Demos" to Modern Web