If you had to explain to executives the specialized critical skill set PMs have, as to why account managers shouldn’t absorb their duties, what 3-4 skills would you say?

Is there a timeline software that has calendar views that can be color coded and works similar to gantt when you shift a day everything else shifts as well?

Anybody know a good website for Gantt chart cheats and tips?

I felt like we needed something like this for project managers in the marketing space. I will start this off. What programs do you use to keep your actions and task organised?