This is the 421st most frequent Chinese word.
美好
Beautiful and good; fine.
The word '美好' describes the pleasant and positive quality of the memory.
她拥有一个美好的回忆。
She has a beautiful memory.
In this context, '美好' characterizes the desirability and positivity of the life being referred to.
美好的生活是我们奋斗的目标。
A beautiful life is the goal we strive for.
Here, '美好' is used to convey the wish for the person to experience good and positive emotions daily.