Picture this, you have a line of type in Word with a phone number in it. But… when ever you type it the first part of the phone number goes on one line and the next part scrolls around to the next line. It just won’t ‘stick’ all together.
What you need is a hard space. This is some thing that looks like a space, prints like a space but sticks things together. To use it, remove the space that is between the two pieces you want to stick together then press Control + Shift + Space Bar and you have your hard space.
Word also has a sticky/hard hyphen. It shows between two words but never splits words across the end of a line. Same thing – Control + Shift + Hyphen.