Sometimes you may notice white smoke coming from your vehicles exhaust that is thin smoke which is normal.
But if the white smoke you're seeing coming out of your vehicles exhaust and tailpipe is a thick white smoke then it's a sign that your engine is burning coolant and the problem needs fixed before it ruins your engine.
You could have a blown head gasket, warped engine head etc.
Thick white smoke coming from your exhaust and tailpipe should not be happening.