I believe what you have heard is something about "trading bots". in which case I give it a 90% possibility that what you heard was from someone advertising a bot in order to make money in case you bought that program. and that has been happening a lot lately because there are currently trading bots that pay people who "refer others" and unfortunately this has turned into a fake advertising competition with lots of false information.
part of it is true though. for example a program (aka trading bot) can take some data from exchange APIs and do a quick analysis on it. which is just a bunch of calculations which the programmer programmed it to do. and that can be a lot faster than you looking at your screen and opening up a calculator to do the same calculations. but don't mistake them for programs that can make you money just because they can do such "calculations" fast.