Waqoof-e-Arafat:

Waqoof means stop or stay for short period.
The time of Waqoof-e-Arafa starts on 9th Dul-Hijjah, but after Zawwal and remain till sunset.

On the Day of Arafa:
(a) Perform Salat-ul-Zuhr and Asr
(b) Make Long Dua (sunnah)
(c) Continue Talbiya

Note: This a is farad ritual of the Hajj, so if you cannot come to Arafat, your Hajj will not be valid. you need to perform Hajj next year.

Proceed to Muzdalifah after sunset without praying salat-ul-Maghrib