Which bold word should I use?
Perfect your / Your English
In the title, capitalise each word. In a sentence, don't capitalise "your" and only capitalise "perfect" if it comes at the beginning of the sentence. For example,
Chapter 2: Perfect Your English
In this chapter, we will help you to perfect your English.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.