Tajweed is the set of rules for pronouncing the letters and sounds of the Qur'an correctly. Many learners can read Arabic script before they have studied these rules, and Tajweed is what turns reading into careful, beautiful recitation.
Learning Tajweed usually starts with the places and qualities of the Arabic letters: where each sound is formed and how it should sound. From there, learners study how sounds change when they meet, and how long certain sounds are held.
Because sound is hard to learn from a page alone, a teacher matters. A teacher hears small mistakes you cannot hear yourself and corrects them early, before they become habits.
A simple way to begin is short, regular practice: a few minutes each day on one rule, reciting a short passage slowly, then repeating it with your teacher's feedback. Consistency matters more than long sessions.
This article is general educational guidance. For questions about specific rulings of recitation, please ask a qualified teacher.
