Proper use of gender identity terms, including pronouns, is a crucial way to signal courtesy and acceptance.
One thing to note: Language changes. Some of the terms now in common usage are different from those used in the past to describe similar ideas, identities and experiences. Some people may continue to use terms that are less commonly used now to describe themselves, and some people may use different terms entirely.
compares using someone's correct pronouns to pronouncing their name correctly – "a way of respecting them and referring to them in a way that's consistent and true to who they are."