The menu option acts as a portal on your page to link to related content. Menus determine access to each option based on the page and block access control automatically. So, for example, if you include 'Onboarding' on your menu, but the end-user viewing the content doesn't have access to 'Onboarding,' they will not see this option on the menu.
Here is an example of a menu block with a mini-grid layout: