The afterglow of the sunset is the evening sunshine just after sunset. There is no such thing as sunset glow. Afterglow refers to the sunshine in the evening, especially the sunshine, and "afterglow" only refers to the residual brilliance.

When distinguishing homophones, we need to know the specific meaning of this word, and then understand the meaning of these two homophones respectively, so as to write the words correctly. The specific meaning needs to be brought into the sentence. The afterglow of the sunset is a beautiful scenery, which most ancient poets will describe.