Looks like the engine oil pan. I can't see any cracks on the pan, so suspect is the gasket between block and the pan.
Cheap part. But they need to drain the oil, take out the pan, replace the gasket and then fix everything back.
Nice chance to change the oil and oil filter
First of all, check the amount of oil left in the engine. If its less, add some oil.
Then check the intensity of leak, If its minor you can drive to workshop (Nearby), else ask your workshop guy to tow it to there workshop as they need lift to open the pan and fix it.
I am worried about the golden pipe in the left, Because to take out the sump, that pipe has to be removed. Check which pipe is it. BTW
, which car is it?