Here’s my somewhat arbitrary criteria for ‘leveling’ the posts I make.
100 level = General usage. Most of these topics are more about using Excel than creating calculations from formulas.
200 level = Basic function usage. Here you’re getting into the basic stages of using the worksheet functions built into Excel.
300 level = Advanced function usage. Here you’ll find yourself nesting functions, and using basic branching logic within your formulas.
400 level = Customization. At this level you’ll be creating macros and custom functions.