Notice how the word soliloquy is a bit like the word 'solo'. This is basically what it is: a solo in drama, where somebody is projecting their inner thoughts. This gives the audience direct access to the character's feelings.
1)Adverb
2)To
3)To show us the cave paintings
4)"Of course I don't know."
The significance about a title or heading are it's Words and Meaning.
As introductory content the single most important quality of a title or heading is that it accurately describes the topic.
Hope this helps
Something that annoys you to no end, something minor
