Conversion work has to happen when it is quiet
Rebuilding a booking flow in July means testing it against the busiest traffic of the year and disrupting the only months that pay. It is the wrong time and everyone knows it.
Doing it in January costs nothing in lost work, and the improved version is what every in-season click lands on. The same media budget then produces more booked jobs without a single extra visitor.
Rankings take longer than a season
Search work started in April rarely matures before the window closes. Started in October, it is in place when demand returns.
That timing difference is worth more than most of the tactical decisions a business here will make all year, and it costs nothing extra to get right.
Reviews decay, so they need a quiet-season plan too
Recency matters in local results and to buyers. A wall of reviews from last summer looks stale by the following spring, right when the comparison shopping starts.
Collecting steadily through the off-season, including from jobs finished months earlier, keeps the profile current at the moment it is being read most.