The customize menu allows you to change content directly on your WordPress website without having to return to the dashboard.
This is the video. Below are the written steps.
How to get to the customize menu
To be able to use this menu, go to the navigation menu, hover over appearance, and then click on customize.
The other way to get to the customization menu
The other way to get this menu is to click the customize link at located in the top bar.
Explore the menu
Once you have done either one of those things it should take you to a page that looks like this. Here WordPress gives you a lot of options to customize your website. You can use the side menu to choose what you want to edit. In the side menu, you can see that you can choose to edit the menus, sliders, the theme, and so on.
You can also click the blue and white pencil icon to edit what you want.
I encourage you to explore this menu.
The customization menu is gone over in more detail in the video located above.