While physical copies are available in Pakistan and India, shipping is expensive and slow for those living in the West (USA, UK, Canada, Europe). The PDF allows a mother in Chicago or a student in London to access the same knowledge instantly.
Taleem-ul-Quran Sabir Qarni is a highly regarded educational resource for Urdu speakers who want to understand the Quran directly through its own language. It is primarily a word-for-word Urdu translation Lafzee Tarjuma Taleem Ul Quran Sabir Qarni Pdf