Definition & Meaning of "to be honest"in English

What does "to be honest" mean in internet slang?

It is often shortened to "TBH" in text and chat, and is used to introduce a sincere, direct, or unfiltered opinion, sometimes one that could be slightly harsh or personal. People typically type "TBH" before giving feedback, confessing a feeling, or answering a question truthfully, such as "TBH I never liked that movie" or "TBH you're one of my favorite people to play with."