The prophet (pbuh) informs and educates us that:

“…Whoever draws nearer (to Allah) by performing any of the (optional / nafl / sunnah) good deeds in (this month: Ramadan) shall receive the same reward as performing an obligatory deed at any other time, and whoever discharges an obligatory deed in (this month: Ramadan) shall receive the reward of performing seventy obligations at any other time… ”

[Narrated by Ibn Khuzaymah]