It belongs to the Indo-Iranian branch of languages of the Indo-European family, which we spoke of HERE.
It is mainly spoken in the Punjab region (between India and Pakistan) and, globally, there are some 100 million speakers of this language.
It derives from dialects such as Hindi and it basically employs the Gurmukhi alphabet for writing, which is heavily tied to the Sikh region.
It is widely spoken throughout modern India, especially in the northern region and, outside this region, within the large groupings of Sikhs in many countries, such as Germany, Argentina, Australia, Canada, Chile, Spain, the United States, France, Indonesia, England, Malaysia, Mexico, New Zealand, the Netherlands, Poland, Singapore, and Switzerland.