See under M for “Macro“. Macro, Excel macro, Excel VBA macro: they’re all the same thing. We’re just talking about a piece of computer code that you can record and run automatically to automate tasks in Excel. To confuse you even more there are other words that people use when they’re referring to Excel VBA macros like “Code“, program, routine and “Module“.
Excel VBA help
E stands for Excel VBA help. You’re going to need lots of it. See under “VBA help“.