I really wanted to be able to use Option + Left or Option + Right to navigate through words in terminal input. Option + Delete to delete a word is also really handy.
The Terminal App has this feature of using the Option key as a "Meta" key. This unlocks all of those great shortcuts ! This article highlights the shortcuts that are unlocked like this : https://www.shell-tips.com/mac/meta-key/
However this breaks some useful basic shortcuts, like all those used to write unicode characters. The pipe character for instance, printed by Command + Option + L cannot be used anymore when this option is enabled.