Fitra, also known as Zakat al-Fitr, is a compulsory charity given at the end of Ramadan before Eid al-Fitr prayer. It ensures that the less fortunate can celebrate Eid with dignity and joy.

ان المصدقين والمصدقات واقرضوا الله قرضا حسنا يضاعف لهم ولهم اجر كريم
Indeed, the men who practice charity and the women who practice charity and [they who] have loaned Allah a goodly loan – it will be multiplied for them, and they will have a noble reward.