Kapālabhāti is a technique emphasising
a rapid, upper abdominal breathing,
with equal pressure on both the inhale
and the exhale through both nostrils.

It is generally classified as a Kriyā.
So it is applied on its own as a Kriyā,
either before the practice of Āsana,
or, as a Kriyā added to specific Āsana,
or within the practice of Mahāmudrā,
or a seated preliminary before Prāṇāyāma,
or as a learning step towards Bhastrikā.

Link to Series: 108 Prāṇāyāma Practice Pointers

Glossary of Āsana and Mudrā Practice Techniques
– Grouped into Standing, Kneeling, Lying,
Inverted, Backbend, Seated & Sitting Categories

Glossary of Prāṇāyāma & Bandha Practice Techniques
– Grouped into Primary, Secondary & Ancillary Techniques