What is this is just to say meaning?

"This is just to say" is a famous poem written by American poet William Carlos Williams. The poem consists of a simple apology written on a piece of paper, in which the speaker confesses to eating a plums that were meant to be saved for breakfast. The poem is known for its simplicity and honesty, and has been interpreted as a commentary on the beauty of everyday moments and the power of sincere apologies. It has become one of Williams' most well-known and anthologized works.