why did the restore screen appear on my ipad
my iPad suddenly stopped working and after shutting it down the restore screen appeared
iPhone 13 Pro
Presumably your iPad indicates that it must be restored:
If you see the Restore screen on your iPhone, iPad, or iPod touch - Apple Support
As for “why” this has occurred, the potential causes are many; without detailed diagnostic information, it is impossible to attribute a definitive explanation as to what has caused the problem.
These support pages outline the available methods to restore an iPad - either from a backup, or to Factory Settings:
Restore your iPhone, iPad or iPod touch from a backup – Apple Support
Restore your iPhone, iPad or iPod to factory settings – Apple Support
Restore all content to iPad from a backup - Apple Support
You’ll need access to either a Windows PC (with iTunes for Windows installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of macOS).
Download and use iTunes for Windows – Apple Support
Update to the latest version of iTunes – Apple Support
Use of a PC or Mac computer is unavoidable. If you don’t have access to a suitable computer of your own, that of a helpful friend or family member will suffice. Alternatively, the technicians at the Genius Bar of your local Apple Store or Apple Authorised Service Provider (AASP) will be delighted to assist.