that you perform repeatedly or on a regular basis. It is a series of commands and actions that can be stored and run whenever you need to perform the task. If, for instance, you wanted to get Microsoft Word to add a certain paragraph to every letter or report that you type, you would turn on the inbuilt macro recorder and type the paragraph in the way you want it to appear. Then when you want to insert the paragraph you would simply run the macro - it will duplicate every word and click of the mouse that you used when you recorded it.
That's an illustration of a very simple use of macros; you can use them for something more complex such as launching a program, copying data from it, activating another program, pasting the data into it and repeating this several times.
Try it, you can have great fun experimenting.