This is the 2519th most frequent Russian word.
радовать
To delight or please.
'Радовать' in this case implies causing visual pleasure or aesthetic joy.
Эти подарки всегда радуют глаз.
These gifts are always pleasing to the eye.
In this sentence, 'радовать' is used in the form 'радуют' as the plural third person to mean 'bring joy.'
Меня радуют успехи моих студентов.
The successes of my students make me happy.
Here, 'радовать' is used to describe the act of making someone happy, with an emphasis on the cause, which is her stories.