It depends on whether you want to just see all the places that the city has to offer or take back with you an experience.
If it's the former, 2 days are more than enough, if it's later, Ghats could so easily take up your 2 days and there would be plenty of left to explore.
p.s. make sure you try all the street food, the city has to offer
You can travel ghats in 4 hr and by the time left visit BHU after that go to Street food and another day visit Sarnath , for shopping visit chaura Bazar .. best place for shopping you can buy any thing you want at cheap price but don't take a car there take a scooty and park it over
Day 1: Go on a boat ride, you'll get to know about all the ghats of varanasi.
Day 2: Visit Kashi Vishwanath Temple, Annapurna Temple and Kaal Bhairav Temple. Time To visit this place depends on the crowd.
Day 3: Visit New Kashi Vishwanath Temple, Tulsi Manas Temple, Sankat Mochan Temple, Durga Temple and Tridev Temple. This would take 2-3 hours. If you have time you can head towards sarnath where you can visit Sarnath Temple, Tibetan Temple, Chinese Temple, Japanese Temple and Sarangnath Temple
*Things not to miss in Varanasi*
Kal bhairav temple
Vishwanath temple, durga mata temple
Tridev temple
Sankat mochan temple
Tulsi manas temple
Mani temple
Bharat mata temple
Sarnath
BHU
Ramnagar
Ganga aarti
Boat riding Banarasi Food Tamatar Chaat
Pani puri Bati Chokha For more information please visit https://bigcab.in
Varanasi is the oldest and one of the most sacred destination in India. Varanasi is famous for the temples that are here, so it attracts a lot of tourists from the entire world who come to visit the city for the sake of its natural beauty, spirituality and serene atmosphere. The city is popularly known as Banaras as well as Kashi. In the city you will find so many location but going to cover most recommended places you should visit.
1. Shri Kashi Vishwanath Temple
2. Dashashvmedha Ghat For Evening Ganga Arti
3. Namo Ghat
4. Kaal Bhairav temple
5. Sarnath
6. Ramnagar Fort
7. Sankatmochan temple
8. Assi Ghat
9. Boat Ride From Popular Ghat
10. New Kashi Vishwanath Temple, BHU
11. Durga Temple, Durgakund
12. Bharat Mata Temple You can follow any of any of itinerary know how to travel: https://triptovaranasi.in/destinations/varanasi-tour-packages/