The 'Start menu' is that ugly stuff at the bottom left which appears when you click on the Windows icon. It may look bad now, but when Microsoft brought out Vista etc, things looked so much worse.
Pin an application to the start menu
Left click on the Windows icon at the bottom left of the desktop. This shows the Windows 10 primary start menu ('Start menu').Find your application shortcut by going through the alphabetically ordered list in the 'Start menu'.
Right click on your chosen shortcut.
Choose 'Pin to start menu'.
Remove an application from the start menu
Left click on the windows icon at the bottom left of the desktop. This shows the 'Start menu'.Find your application shortcut icon within the 'Start menu' on the right.
Right click the icon and choose 'Unpin from start'.
Pin an application to the taskbar
Left click on the windows icon at the bottom left of the desktop. This shows the 'Start menu'.Find your application shortcut by going through the alphabetically ordered list in the 'Start menu'.
Right click on your chosen shortcut.
Choose 'More' -> 'Pin to taskbar'.
Settings
Left click on the primary 'Start menu'.To the far left are a small number of small icons.
Choose 'Settings'.
Notifications
Left click on the primary 'Start menu'.To the far left are a small number of small icons.
Choose 'Settings'.
Choose 'Notifications & actions'.
Turn off some of those pesky apps which send you notifications when you're trying to work.
Keyboard shortcuts
Alt + Tab : Switch between open appsAlt + F4 : Close the active item, or exit the active app
Windows logo key + L : Lock your PC
F10 : Activate the Menu bar in the active app
Ctrl + Esc : Open Start
Ctrl + Shift + Esc : Open Task Manager
Esc : Stop or leave the current task
Windows logo key + E : Open File Explorer
Windows logo key + I : Open Settings