What is the song Jar of Hearts by Chrisina Perri about?

"Jar of Hearts" by Christina Perri is a song about a breakup and the emotional aftermath. The lyrics metaphorically describe the singer trying to mend her broken heart by putting it in a jar. The song expresses the singer's vulnerability, pain, and longing for the relationship she has lost. The theme revolves around themes of heartbreak, healing, and the search for strength and resilience in the face of adversity.