What is Ctrl + ⌘ Cmd + P then 1 keyboard shortcut for?

Popular programs using this shortcut

What this shortcut does in different programs?

1. Google Docs (iPhone & iPad) - … to 6: Move to previous heading [1-6]  
2. Google Docs (macOS) - … to 6: Move to previous heading [1-6]  

All programs

All programs using this shortcut, by category.

Note: This page includes variations for Ctrl + Command + P then 1
Command + Ctrl + P then 1
Ctrl + Command + P then 1. Restrict to only Ctrl + Command + P then 1.