terminology - Why would a photographer do focus stacking?

Recently, I come across the term called Focus Stacking where you combine different pictures with different focus points.

My question is, why do the focus stacking? Are there any benefits from the photographic POV?

Thank you in advance!

Answer

Focus stacking allows you to create an image with a greater apparent depth of focus (i.e. more of the subject in focus) than would otherwise be possible.

This is used in fields like macro photography where you are often working at the limits of the capabilities of the lens.