Special Drawing Rights (SDRs) are an international reserve asset created by the International Monetary Fund (IMF). They're not a currency per se, but rather a potential claim on freely usable currencies of IMF member countries.
The IMF allocates SDRs to member countries in proportion to their quota shares. Countries can use SDRs to bolster foreign exchange reserves, settle transactions with other countries, or repay IMF obligations. The SDR's value is based on a basket of five major currencies: the US dollar, euro, Chinese renminbi, Japanese yen, and British pound.
Bangladesh has benefited from SDR allocations, which have helped strengthen its foreign exchange reserves. The country gained from the IMF's historic $650 billion equivalent SDR allocation in 2021.