What is best time to post?
The best time to post is when the people you want to reach are most likely to be online and scrolling, which differs by audience, platform and time zone.
Why it matters
General guides are a starting point only; your own post history shows when your audience actually engages. Scheduling lets you post at those times even when you're busy.
Example
A café finds its posts at 7:30 a.m. do better than those at noon, because its regulars check their phones on the way in.