Question

question: michelle created a header with a navigation menu and wants it to stay at the top of the page while users scroll. what is the best way to do this?
find a plugin, install it, activate it, and build a new header
change her theme to a header that stays at the top
lock the header in the block editor
set the position to \sticky\

Explanation:

To make a header stay at the top (sticky) while users scroll, setting the position to "sticky" is a common and effective CSS - related method. Locking in the block editor doesn't ensure it stays on top while scrolling. Changing the theme might not be targeted to just make the header sticky. Finding, installing, and activating a plugin for a new header is more complex than a simple position setting if the goal is just to make it sticky.

Answer:

Set the position to "sticky".