Press a certain key combination on your keyboard and your computer / phone writes out any predetermined phrase you want wherever your your keyboard cursor is located. 😍 Useful for pasting common things like email, address, phone number, btw expands into "By the way", etc. This is going to save me some keystrokes! 😂 Don't use this for passwords, financial information or other sensitive information!
AutoText for Windows
https://sourceforge.net/projects/autotext/
AutoKey for Linux Mint
Search for "autokey" in the Linux Software Manager. AutoKey has some other nice features. Press CTRL+F7 and it shows you a numbered list of your phrases you can paste. You can also set custom keyboard combinations. Be sure to hit the save button to activate the shortcut! 😅
Macs
Go to Apple menu > System Preferences > Keyboard > Text. Works almost everywhere on your computer. Espanso is another great alternative. :)
iPhones / iPads
Go to Settings > General > Keyboards > Shortcuts.
Androids
Go to Settings and search for "Personal dictionary." Usually located under Settings > System > Language & input > Personal dictionary. Tap on "For all languages" or on your desired language. Tap on the "+" button. Next time you type your shortcut, the suggestion will appear on the top of your keyboard.
AutoHotkey
Honorable mention. 😄 Another program for automating repetitive keyboard and mouse actions on Windows is AutoHotkey. Great for data mining too.