Marta Matus focuses in her work on children's book illustration. She uses digital collage and drawing techniques, as well as paper collage. In her illustration, one can find jokes that the author likes to hide in her work. The book Etiketa. Pravidlá slušného správania illustrated by Marta Matus was on BCBF2022 shortlisted in 100 most beautiful books in the world. Besides publishing her work in books, she likes to illustrate magazines too.