What does "nothing say" mean here? Is it a common phrase?

Native speaker’s answer
Rebecca
The expression "nothing says X like Y" means "nothing expresses the idea/sentiment of X like Y," to express the idea that something is strongly in favor of or supports the idea for something. Here, "nothing says Valentine's Day like strawberries and champagne" to mean that strawberries and Champagne express the idea of Valentine's Day very well. Ex: Nothing says Christmas like Christmas trees and carols. Ex: Nothing says summer like ice cream and sunshine.