Tajwd (تجويد) literally means to do something beautifully and beautifully or nice and good, tajwid comes from the word "Jawwada" (جوّد-يجوّد-تجويدا) in Arabic. In the science of Qiraah, tajwid means removing letters from their place by giving them the characteristics they have. So the science of recitation is a science that studies how to recite or pronounce the letters contained in the holy book Al-Quran and Hadith and others.

The law of people who study Tajweed is Fardhu Kifayah. And the law to practice it is Fardhu Ain.