shot
One run of a quantum program, ending in one measured result.
A quantum computer gives a slightly different result each time it runs the same program, because measurement is a matter of odds. So a program is run many times and the results are averaged. Each run is called a shot. More shots give a more precise average. Machine time is usually counted, and paid for, in shots.
Think of it as
Like polling voters: one answer tells you little, and the more people you ask, the closer you get to the true figure.
Example
A team needs an answer accurate to about 1 part in 100. Their provider quotes the job in shots, so the number of shots needed sets the bill.
Ideas that use this term