what is a title

I think that what goes into my titles is I wait to see what I have written and try to find things that i go back to time and time again in the essay about the genre. I take lets say I talk about rock music if I talk about the different styles of playing guitar and how it has evolved into many different ways to play. I would then probably make the title Guitar Styles Evolved. For it mostly has to relate to the essay sort of like a newspaper headline.