Short answers, pulled from the story.
Ustad Ali Quli was an Ottoman commander who served the Mughal Emperor Babur as his artillery chief. He was dispatched by Ottoman Sultan Selim I in 1513 to assist Babur in his conquests, and he commanded cannon batteries at the Battle of Panipat and the Battle of Khanwa.
Selim I feared that Babur would ally with the Safavids, a rival power, so he reconciled with Babur in 1513 and dispatched Ustad Ali Quli and other Ottoman commanders to assist him. This followed an earlier period of hostility in which Selim I had supplied Babur's Uzbek rival Ubaydullah Khan with weapons.
Ustad Ali Quli commanded the artillery at the Battle of Panipat and the Battle of Khanwa, both fought during the reign of Babur. His cannon batteries, together with the riflemen under Mustafa Rumi, were credited as vital to winning both engagements.
Ustad Ali Quli and his Ottoman colleagues taught Babur to use matchlocks and cannons in open field battles, not only in sieges. Babur adopted this tactic, which gave him a significant advantage in his Indian campaigns.
The assistance Selim I provided through Ustad Ali Quli and other Ottoman commanders in 1513 was described as the basis of future Mughal-Ottoman relations. A transfer driven by political caution grew into a lasting diplomatic and military connection between the two empires.
Mustafa Rumi, an Ottoman matchlock marksman, commanded the riflemen at both battles alongside Ustad Ali Quli's cannon batteries. Together, their combined force was identified as decisive in securing Babur's victories.