Is there a suitable length of time for FB?
Thirty or forty seconds, I feel that it's more expensive if it extends more than 1 minute.
Better be within 1 minute, otherwise, the completion rate is too low and the CPM is too high.
Half a minute or so, too short is also not okay.
Not necessarily. I have a few videos that run more than 1 minute, which is cheaper.
Half a minute to about 1 minute. The content we wish to relay won't be clear if it's too short. If it's too long and the completion rate is low.
I feel like the best is 30 seconds. And the completion rate is also high.
The best is within 1 minute.