...the poem, “The Giving Tree”.

Kelly TanIs the comma after poem needed.

No. Appositives don't need to be set off with commas.

The planet Jupiter is the largest planet in the solar system. (no commas)

CJ

Thank you CJ. Could you elaborate on your reply.

Kelly TanCould you elaborate on your reply?

In what way specifically? What do you not understand about "No commas are needed"?

Do you know what an appositive is, i.e., a noun in apposition? Is that a problem for you?

CJ

Thank you CJ.

The planet Jupiter is the largest planet in the solar system.

The children enjoyed an outdoor puppet show based on the poem,“The Giving Tree”.

I cannot see the connection between The planet Jupiter and the poem,“The Giving Tree” in apposition.

If you explain a bit

Kelly TanI cannot see the connection

Hmm.

The name of the planet is Jupiter. The name of the poem is "The Giving Tree". In both cases you mention the same thing twice, but in different words. The first word gives a general category; the second word gives a specific entity within that category. We don't separate such pairs of words with commas.

Thank you CJ.

It's clear now. Your explanation is short but easy to understand.