Esusu describes traditional forms of cooperation in African societies whereby groups of individuals contribute to informal savings and credit associations for their mutual benefit. You have it in Nigeria and similar variations called Ajo or Adashe however you can find variations of it in several places. It’s known as Nago in Ivory Coast, Yesyes in Togo and Susu in Ghana. Esusu is a form of micro-finance savings, where you pool periodic (e.g. weekly) cash contributions with other people, in which you all take ‘turn’ to receive the pot. Think of it as an interest-free savings account.