May-Grünwald-Giemsa st aining (MGG staining) is one of the most frequently used staining methods for cytological smears - especially for..:
Blood smears
Bone marrow smears
Cytological preparations (e.g. punctates, smears, fine needle aspirates)
It is a combination of May-Grünwald staining (fixation & pre-staining) and Giemsa staining (differentiation & contrast enhancement).