It allows you to follow along during the public reading in the synagogue, ensuring you don't miss a single word—a requirement for fulfilling the mitzvah.
Several reputable organizations offer free, high-quality downloads of the Megillah: meguilat esther pdf
Many PDFs include English translations, transliterations, or "transtropilations" (English text set to the traditional melodic chant) to make the text more accessible. It allows you to follow along during the