Typography

A font is the visual design of an alphabet
A typeface is a family of fonts
A serif is a small line or protrusion that begins or terminates a line
A Sans-serif lacks the small lines or protrusion that begins or terminates a line

Leading: The space between lines of text. -Example
                                                                        ()
                                                                    Example

Kerning: The space between characters. - E()xample

Tracking: The space between a word. - Example()Example

Paragraph Alignment: Even line lengths looks better and makes reading easier.

Widows: Words all by themselves at the start of a paragraph.

Orphans: Words all y themselves at the end of a paragraph