softly can be used as an adverb to describe manner or degree of an action, such as how something is done or said.
softly is used to describe the way something happens; it is often used to describe a quiet or gentle action, such as speaking softly or holding something gently.
1. He opened the door softly, not wanting to wake his sleeping wife.
2. She sang her song softly, accompanied by the stringed instruments in the background.
3. They whispered their secrets softly to each other.
softly should not be confused with slowly, which is used to describe the rate at which something occurs. Additionally, it should not be confused with softly for other parts of speech, such as 'a softly spoken phrase'.