A new tip was spreading around on Twitter today that blew my mind and a lot of others. Simply pressing and holding any key on the keyboard allows you to easily move the text cursor around like a mouse with your finger. Using this trick makes it much easier to move the cursor to a desired location while editing compared to what I thought was the normal and frustrating method of tapping where you want to go when editing a message or text. This feature was added in iOS 12, so has not been out for that long.
Source: https://www.bleepingcomputer.com/news/apple/holding-down-any-ios-keyboard-button-turns-it-into-a-mouse/