I found on Internet that "better still" is used when someone makes a good suggestion, but you have an even better one. As in this sentence: You can send them your resume or better still, try contacting the manager directly.
And cambridge dictionary define the meaning as: even more satisfactory
I am confused, is "better still" only used to make suggestion or can it be used in other way? For example in the following sentence the phrase has been used according to the meaning given in the cambridge dictionary.
"That act of kindness is a cherished memory in our hearts better still it is growing as many times it has encouraged us to offer others something beyond their expectation."
Are both meanings and sentences right?