From a marketing perspective it's likely most visitors will hit your site first on mobile. You probably need to deliver enough value on mobile to get the person

From a marketing perspective it's likely most visitors will hit your site first on mobile. You probably need to deliver enough value on mobile to get the person to remember you when they return to their laptop. If you offer no info on mobile your conversion rate in getting visitors to go through the hassle of finding you again on their laptop/desktop is likely to be very low.