With text replacement, you can use shortcuts to replace longer phrases. When you enter the shortcut in a text field, the phrase automatically replaces it. For example, you could type "GM" and "Good morning" would automatically replace it.  To manage text replacement, tap Settings > General > Keyboard > Text Replacement.  To add a text replacement, tap the Add button , then enter your phrase and shortcut. When you're done, tap Save.  To remove a text replacement, tap Edit, tap the Remove button  then tap Delete. To save your changes, tap Done.