Actually

The word "actually" is an adverb with several meanings and uses:

• As a statement of fact It can emphasize the truth or reality of a statement, or be used as another way of saying "really"125. For example, "I don't know what actually happened"1.
• To indicate surprise It can introduce information that is unexpected or contrary to what one might think13. For example, "You actually like modern jazz?"3.
• To politely correct It can be used to correct someone or introduce a change or contrast in what is being discussed34. For example, "Yes. Actually, they're Australian"3.
• As a discourse marker It can be used in speaking to introduce a new topic, add information, or provide more detail34.

Citations:

1. https://www.britannica.com/dictionary/actually
2. https://www.vocabulary.com/dictionary/actually
3. https://dictionary.cambridge.org/us/dictionary/english/actually
4. https://www.youtube.com/watch?v=lazmC213yVg&vl=en
5. https://www.collinsdictionary.com/us/dictionary/english/actually
6. https://www.dictionary.com/browse/actually
7. https://www.oed.com/dictionary/actually_adv
8. https://dictionary.cambridge.org/us/dictionary/learner-english/actually