I am looking forward to seeing what the other advisors and experts say on this topic – what I have learned on engaging audiences is that being consistent and regular in your posting enables you to build an engagement with you audience. The other aspect is understanding what your audience actually wants to see, wants to read – you can get this from the engagement, but also trying to understand from direct engagement with them about their interests – obviously the outcome of what action people take e.g. liking, sharing, commenting helps indicate whether the content is something they are interested in – and ultimately the actions in terms of sales if that is what you are looking for.
I reckon, trial and error is a good approach for a period of time.
Go well. Andy