#1 Go under Appearance >> Menu
A screen will appear and you will need to start by naming the menu. Then click on Create Menu.
#2 You will then see Pages, Custom Links and Categories on the left
Check whatever you want to appear on the menu and click Add to Menu.
Pages: Basically adding pages that you have created to the menu
Categories: Basically adding categories that you have created to the menu
Custom Links: Basically adding specific links that appears on your menu
#3 Once you have added the menu, choose where you want the menu to appear under the Menu Settings
However, this settings could vary for different themes.
#4 Complete the above and click Save Menu
Visit your WP website and your menu will now appear.
#5 Go back to your menu if you would like to rearrange the position of it
It’s simple to rearrange it. All you need to do is drag and drop how and where you like it.
See screenshot below for reference.