How do poets convey messages about themselves, society, and the human condition? What are some of thetopics, techniques, or ways they do this?

An overall metaphor- a poem might revolve around a particular subject but describes a theme
the style of writing is also important, a poem with less word can be very powerful, and used to describe the incapability to describe using words
Conveying the message is getting the idea through, by either humour or a dark story, there are many ways

Ifound this on google “what are motifs? a motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. a motif gives clues to theme or reinforces ideas an author wants to emphasize.” i hope this for what your looking for