This is the 24th most frequent Chinese word.
好
"Good" or "well."
Here, "好" describes the quality of the book, conveying the meaning "good" or "excellent."
这本书很好。
This book is very good.
In this sentence, "好" describes a state of well-being, indicating someone feels well or good.
我感到很好。
I feel very good.
In this context, "好" serves as part of a greeting phrase, meaning "good" or "well" as a polite address.