In computer science, a macro is a rule or pattern that specifies how a certain input should be mapped to a replacement output). Macros are used to make a sequence of computing instructions available to the programmer as a single program statement, making the programming task less tedious and less error-prone). Macros can also be used to automate repetitive tasks by mapping a short string to a longer sequence of instructions.

Macros can be used to automate input sequences that imitate keystrokes or mouse actions, which can be helpful for replacing a repetitive series of actions. Keyboard and mouse macros allow short sequences of keystrokes and mouse actions to transform into other, usually more time-consuming, sequences of keystrokes and mouse actions).

In Microsoft applications, macros are sequences of events such as keystrokes, mouse clicks, and delays that can be played back to help with repetitive tasks. Macros can also be used to replay sequences that are long or difficult to run. In Access, macros are a tool that allows you to automate tasks and add functionality to your forms, reports, and controls.

Overall, macros are a useful tool for automating repetitive tasks and simplifying programming tasks.