only manually done iCloud backups from my iPad-8 on Wi-Fi, I must turn off switch 1

Hello lsepolis123,

Thank you for reaching out in Apple Support Communities. We understand you'd like to know the differences for each of the backup methods. Here's detailed information that will help provide you a better understanding:

"Decide which method is best for you

In case you ever need an alternative backup, you can back up your device using iCloud and also using your computer. Learn how to back up your device or restore your device from a backup.

iCloud

• Stores backups in iCloud
• Offers up to 2TB of storage (with an Apple One Premier plan, you can get up to 4TB)
• Always encrypts your backups
• Lets you create and use backups from anywhere with Wi-Fi

Computer

• Stores backups on your Mac or PC
• Storage depends on your Mac or PC's available space
• Offers encrypted backups (off by default)
• Lets you create and use backups from your Mac or PC

iCloud backups

With a Wi-Fi network connection, you can back up your device using iCloud. You don't need to plug your device into a computer to back up with iCloud. 

iCloud backups include nearly all data and settings stored on your device. iCloud backups don't include:

• Data that's already stored in iCloud, like Contacts, Calendars, Notes, iCloud Photos, iMessages, Voice Memos, text (SMS) and multimedia (MMS) messages, and Health data
• Data stored in other cloud services, like Gmail and Exchange mail
• Apple Mail data
• Apple Pay information and settings
• Face ID or Touch ID settings
• iCloud Music Library and App Store content
• 
  

Learn how to back up your device using iCloud or how to manage iCloud storage and delete backups that you no longer need.

When you use Messages in iCloud, Health data on iOS 12, or Voice Memos, your content is automatically stored in iCloud. If you turn on iCloud Photos, your content is also automatically stored in iCloud.

Backups from your computer

A computer backup of your device, which is not the same as a sync, includes almost all of your device's data and settings. A backup from a computer doesn't include:

• Content from the iTunes and App Stores, or PDFs downloaded directly to Apple Books
• Content synced from Finder or iTunes, like imported MP3s or CDs, videos, books, and photos
• Data already stored in iCloud, like iCloud Photos, iMessages, and text (SMS) and multimedia (MMS) messages
• Face ID or Touch ID settings
• Apple Pay information and settings
• Apple Mail data
• Activity, Health, and Keychain data (to back up this content, you'll need to use Encrypted Backup in iTunes.)

Learn how to back up your device using your computer, how to find backups on your Mac or PC, and how to delete backups that you no longer need."

This information is outlined in this article and provides an easy understanding for each backup: Backup methods for iPhone, iPad, and iPod touch - Apple Support

Kind regards.