Philodendron birkin plants thrive from bright indirect light. You want to give your plant the feeling it’s under a tropical canopy.
Like most plants, you want moist soil so your philodendron birkin can soak up the hydration.
But you also want to avoid over-watering your plant so you can avoid that dreaded wet feet.
So, you want to wait until the soil is mostly (but not all) dry before you water it.