Doc goes over whether or not to water and fertilize a lawn in the winter. The simple answer is no for dormant lawns and yes for anything that is actively growing. The only time that lawns and plants in general need food and water is when they are active and growing. Dormant lawns should be left alone.
Did you miss our previous article...
https://lawnmaintenancetips.com/spring-tips/how-to-do-a-spring-lawn-renovation-e1-getting-on-top-of-weeds