What is it?
Fitrana (also called Zakat al-Fitr or Sadaqat al-Fitr) is an obligatory charity paid at the end of Ramadan, before Eid prayer. It's the equivalent of approximately 2.5kg of staple food (or its cash value) per person in the household.
The Prophet ﷺ said it was prescribed “to purify the faster from idle talk and obscenity, and to feed the poor”. (Abu Dawud)