Characteristics:
1) Register changes depending on how formal or casual the situation is.
2) It affects the words we use, the tone of our voice, how we structure sentences, and the overall style of communication.
3) We use different registers for different contexts, such as more formal language in academic writing and casual language in day-to-day conversations. For instance, in a job interview, we speak more formally, but with friends, we talk casually.
