A Tolerated Stay Permit or "Duldung" is not an actual residence permit, but rather a temporary residence document which enables you to stay in Germany for a limited period. Those who hold a tolerated stay permit can legally reside in Germany for the time, but their obligation to leave still stands. A tolerated stay permit is usually valid only for a few days, weeks or months. If the deportation impediment(s) or other causes of issuing a "Duldung" persist, your tolerated stay permit will be extended- otherwise, it will not be prolonged.
You can learn more in section “How long is my Duldung valid?“ below.