Horizontal spacing in typesetting includes the space between characters, kerning and tracing, and the space between words, word spacing.
Whitespace characters don’t result in a visible mark but do occupy an area on a page. The space character, inserted into text when you press the spacebar, is the most common. Other whitespace characters are narrower or wider than the space character and used to optically align text or numbers. Use these to avoid typing two or more space characters in a row or nudge a little space around punctuation.
Word Spacing is the space between words that results from pressing the spacebar. This space is flexible; it can be expanded or compressed; it can be fixed and unchanging or elastic and adapt to circumstances.
Each letter is designed with a small amount of blank space on the left and right sides. This spacing is set by the font's designer and is part of the letter itself; it cannot be changed. In technical terms, any character (letter, punctuation mark, number) is called a...