VBA (Visual Basic for Applications) is a programming language used to automate tasks in Excel by writing macros, allowing you to extend Excel's functionality beyond standard features.

Go to Developer tab > Record Macro, perform your actions, then stop recording. The macro will be saved and can be run later to repeat those actions automatically.

VBA allows more complex logic, error handling, user interaction (forms), and customization that isn't possible with simple macro recording.

Press Alt+F11 to open VBA Editor, locate your macro in Modules, and modify the code as needed to enhance or fix the recorded actions.

Automating repetitive tasks, creating custom functions, building user forms, processing large datasets, generating reports, and integrating Excel with other applications.

In VBA Editor, go to Insert > UserForm, design your form with controls, and write code to handle events like button clicks and form initialization.

Subroutines perform actions without returning values, while functions return values and can be used in Excel formulas like built-in functions.

Use breakpoints (F9), step through code (F8), watch variables, and use Immediate Window (Ctrl+G) to test expressions and debug your macros.

Lock the VBA project with a password in VBA Editor (Tools > VBAProject Properties), though this isn't foolproof against determined users.

Use Option Explicit, meaningful variable names, error handling (On Error), comments, modular code, and avoid selecting/activating objects unnecessarily.