Bid by the clock, because a 4pm Perimeter crawl kills the same day slot
An ad schedule that ignores traffic buys clicks for appointments you cannot honor.
A click at 8am and a click at 4:30pm are worth different amounts to an HVAC company here, because one can still become a same day job and the other usually cannot. If a call at 4:30 means crossing I-285 in the worst hour of the day, the booking either slips to tomorrow or arrives late.
Pull the dispatch record before touching bid adjustments. Which hours produce jobs that actually got run that day, and from which direction. Most accounts we look at have never had that question asked of them.
Adjust in both directions. Bid up the morning hours when a truck can still be routed profitably, and pull back the late afternoon in the zones that require a long haul. The point is not to spend less. It is to spend where the click can turn into work today.
Weekends are a separate decision, not a copy of weekdays. Traffic patterns differ, the caller's situation differs, and the on-call cost of answering differs.