In general, micro analysis will be analyzing each individual part of a system. Macro analysis will be analyzing the system (or set of systems) as a whole.
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Macro economics is the study of the sum total of economic activity, dealing with the issues of growth, inflation and unemployment and with national economic policies relating to these issues. while...
Microeconomics deals with economies on a small scale, with a lot of math involved. Macroeconomics deals with economies in the big picture, such as globally. There is less math in macro, but it still...
Macro means large in scale, micro means small in scale. So macro influence means that something has a large influence, while micro (remember microscope) is something that has a small influence.